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Applied Calculus
Let f(x) = −x2 + ax + b. Determine the constants a and b such that f has a relative maximum at x = 2 and the relative maximum value is 13.
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Chemistry
The energies, E, for the first few states of an unknown element are shown here in arbitrary units: n= 1, E=-21 n=2, E=-9 n=3, E=-4 n=4, E=-3 ...,... infinity, 0 A gaseous sample of this element is bombarded by photons of various energies (in these same
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Language Arts
What are concrete details?(1 point) A. specific and observable facts that help with understanding B. exact meanings of all the key words in a text*** C. exact words taken from a speech or text D. words that illustrate an idea What does elaborating mean?(1
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Biology
Can someone check my answers on Conexus Unit 3 Lesson 8 please! 1) Infer a disadvantage of a 2D model of the digestive system.(1 point) a. difficulty identifying organs b. difficulty determining the texture of organs*** c. difficulty determining the
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English
What is a transition?(1 point) A. a change from one subject or stage to another*** B. the flow of a person's thoughts C. a method used to manage work D. a thought or understanding Which type of relationship does the transition phrase "as well as"
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Math
Each type of text has a purpose for the reader if you were looking to research penguins what type of text would u utilize A. textual B. functional C. recreational D. digital how is functional text useful in everyday life A. it provides entertainment B. it
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Art
1. Which of the following design principles is evident on this dish? A. texture and harmony B. asymmetrical balance and pattern C. radial balance and pattern D. symmetrical balance and harmony My answer: C 2. The usage of white lines retreating towards the
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Physics
Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80. What is the magnitude of the friction force on the filing cabinet?
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Science
What is most responsible for any movement in the Earth's rock plates? A. Divergent plate boundaries B.convection currents C. Convergent plate boundaries
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Language Arts
Why do writers add multimedia to an informational text?(1 point) 1. to help the reader comprehend the facts, comparisons, or details in the writing 2.to hide details from the reader that are boring, nonessential, or irrelevant 3.to make the organizational
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Social studies
Which theory of migration states that people sailed down the West coast of North America to make settlements? A) European Migration theory B) Northern Asia Coastal theory C) Bering Land Bridge theory D) Polynesian theory
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Science(Respiratory and Circulatory Systems)
What function do the alveoli perform? exchange oxygen in the blood for carbon dioxide carry oxygenated blood away from the heart hold receptors for the sense of smell exchange oxygen in the air for carbon dioxide *** Which organ of the respiratory system
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Organizing Information
1. What is the purpose of formatting a text?(1 point) A to help the reader follow and understand the writer's ideas B to make the print of the text visually appealing C to provide ways to include more information about the topic D to demonstrate the
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Biology
Active and passive transport are important processes that help the cell? A. maintain the cellular membrane. B. change the size and shape C. regulate the uptake and removal of materials. D. metabolize materials. I don't know if I'm wrong but I think it's C?
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Physics
Block B in the figure(Figure 1) rests on a surface for which the static and kinetic coefficients of friction are 0.65 and 0.40, respectively. The ropes are massless.What is the maximum mass of block A for which the system is in equilibrium? (Consider the
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chemistry
A 15.27 g sample of Mo2O3(s) is converted completely to another molybdenum oxide by adding oxygen. The new oxide has a mass of 18.33 g. Add subscripts below to correctly identify the empirical formula of the new oxide.
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Calculus
Find the volume of the solid whose base is the circle x^2+y^2=64 and the cross sections perpendicular to the x-axis are triangles whose height and base are equal. Find the area of the vertical cross section A at the level x=7.
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chemistry
Suppose that the microwave radiation has a wavelength of 12 cm . How many photons are required to heat 295 mL of coffee from 25.0 ∘C to 62.0 ∘C? Assume that the coffee has the same density, 0.997 g/mL , and specific heat capacity, 4.184 J/(g⋅K) , as
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physics
A string is wrapped around a uniform solid cylinder of radius r. The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block and cylinder each have mass m. Note that the positive y direction is downward and
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language arts
Which of the following describes what it means when subjects and verbs agree?(1 point) 1. They describe the same things. 2. They are not separated by interrupting words. 3. They are both singular or both plural 4. They have the same ending. Which sentence
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science
During cellular respiration, the covalent bonds of a molecule are broken down to form products. Which molecule is broken down? ADP carbon dioxide water sugar*** During cellular respiration, four total ATP are produced when pyruvic acid is created. What
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Algebra
1. What is another way to write:72-(-25)? 72+25** -72-25 72-25 -72-(-25) What is the value of -27-8? -35** -19 19 35 How much is 37+13? -50 -24 24 50** What is the solution to:40+)-11)? -51 -29 29** 51 What is the value of:-31+30? -61 -1** 1 61
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Genes, Chromosomes, and DNA Quick Check
Question 1 A) What is the term for a section of a DNA molecule that codes for proteins?(1 point) chromosome cytosine gene deoxyribose Question 2 A) Eukaryotic chromosomes tend to be much larger than prokaryotic chromosomes. In order to package these large
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social studies
What is considered the greatest example of Incan engineering? the chinampas the road network the ayllu system the food storehouses
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Adding Graphic and Multimedia quick check
What is the purpose of adding graphics and multimedia to informational texts? (1 point) A to remove difficult vocabulary from a text B to clarify certain kinds of information for ease of understanding C to reduce the amount of information for the reader D
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Science
1- Where is Nicholas's home located? A- (1,1) B- (0,1) C- ( -1,0) D- (0,0) 2- Nicholas's school is located at _____. A- (0,0) B- (1, -1) C- (-2, -2) D- (3,2) 3- What is located at (-2, -2)? A- Nicolas's home B- post office C- school D- grocery store 4-What
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Language Arts
Which antecedent and pronoun best fill in the blanks in the sentence? __________ is best known for ________ oatmeal cookies. (1 point) Avery and Michelle; our The Smiths; their Jim; their Martha; her 2. Choose the correct pronoun pair to complete the
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Math
What multiplication fact can be found by using the arrays for 2x9 and 5x9?
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Social Studies
The largest mass migration in human history has taken place in China. Why? a. Chinese are seeking political amnesty in other countries b. Chinese are moving from the rural areas to work in urban factories c. Workers are leaving the rural areas to work in
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Chemistry
Rank the following fertilizers in decreasing order of mass percentage of nitrogen: NH3 NH4NO3 (NH4)2HPO4 KNO3 (NH4)H2PO4 (NH4)2SO4
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physics
Two planes are initially separated by a horizontal distance of 350 km. Plane A is positioned 350 km west of the Plane B. Plane A is initially traveling at a velocity of 60 m/s east. Plane B is traveling at a velocity of 45 m/s west. If plane A begins to
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Physics
A boat’s speed in still water is 1.95m/s . The boat is to travel directly across a river whose current has speed 1.20m/s . Determine the speed of the boat with respect to the shore. Despite, I did it like taking the sqrt (1.95^2+1.20^2) is there
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Physics
Block 1, of mass m1 = 0.650kg , is connected over an ideal (massless and frictionless) pulley to block 2, of mass m2, as shown. For an angle of θ = 30.0∘ and a coefficient of kinetic friction between block 2 and the plane of μ = 0.400, an acceleration
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Math (Please help immediately)
Two angles form a linear pair. The measure of one angle is 8 times the measure of the other angle. Find the measure of each angle.
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Physics (Algebra-based)
A block starts at rest and slides down a frictionless track except for a small rough area on a horizontal section of the track.It leaves the track horizontally, flies through the air, and subsequently strikes the ground. gravity= 9.81 m/s^2.
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College Calculus
Odzala National Park in the Congo has a high density of gorillas. Suppose that the radial population density is p(r)=52(1+r^2)^-2 gorillas per square kilometer, where r is the distance from a large grassy clearing with a source of food and water. Calculate
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stats
Find the z-scores for which 92 % of the distribution's area lies between minus z and z.
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Mental & Emotional Health
1.)True & False Life changes, whether they are positive or negative, can cause stress True or False 2.)Making a list of what you have to do & identifying what is most is an example of ? A.)Mental rehearsal of tasks B.)Relaxing by list making C.)Time
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Chemistry
When salt dissolves completely into water, which term is used to describe the water? solvent concentration solute solution Does anyone have the whole test for solutions, acids, and bases unit test?
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Help
Which two groups of elements in the periodic table are the most reactive?
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algebra
Which set represents a Pythagorean triple? 27, 38, 42 33, 44, 55 35, 38, 42 68, 72, 81 Which number completes the Pythagorean triple: 12, 16, ____? 18 20 22 24 A base ball diamond is square. The distance from home plate to first base is 90 feet. In feet,
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WGeo
Which phrase best describes information technology? A. systems that store and send content B. systems that create and modify content C. systems that replace and delete content D. systems that use content for business**
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Math PLZZ
1. Which set of numbers represents a Pythagorean triple? 6, 9, 12 7, 10, 12 16, 18, 25 27, 36, 45* 2. If the lengths of the legs in a right triangle are 7 and 8, what is the approximate length of the hypotenuse? 1.4 3.8 5.4* 10.6 3. Which set represents a
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Parts of a Multicellular Organism Quick Check
Questions: 1.In the model that you built of the respiratory system, what structures did the straws represent? 2.Your hand jerks up after touching a hot stovetop. Which two organ systems are most responsible for your reaction? 3.The diaphragm can be
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math
to graph C(3,2) on a coordinate plane Translate the point left 3 units and down 1 unit.Graph the image point C. A. x,2,y3=x,1,y,1 B. x,2,y2=x,1,y,1 C. x,2,y3=x,1,y,1 D. x,3,y2=x,1,y,1 Is the answer D? Thank you
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English
What is active voice?(1 point) A.voice of writing using the present tense B.voice of writing using the past tense C.voice used in writing in which the subject of a sentence does the action*** D.voice used in writing in which the subject of the sentence
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social studies
1. In which of the following areas is there a large concentration of American Indian and First Nations peoples? A. the interior west of the United States and Canada B. the Atlantic and Pacific coasts of the United States and Canada--------- C. the Great
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Energy and Matter Conservation Quick Check
Questions: 1.How many molecules of pyruvic acid are produced when a single glucose molecule undergoes glycolysis? 2.Order the atoms involved in cellular respiration from most prevalent to least. 3.How many CO2 molecules are produced when three glucose
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Social Studies
Which of the following was one way the Constitution attempted to reconcile a weakness of the Articles of Confederation? (1 point) The Constitution gave more power to the states. The Constitution provided a more centralized government. All enslaved African
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History
What was the main response of the middle class to the challenges of city living? A. escape to the suburbs B. move to high-rise apartments C. rent out tenement buildings D. attend vaudeville shows Which of the following was the most compelling reason for
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Social Studies
What were some influences on self-government? Select all that apply. Commentaries on the laws of England** The Columbian exchange English bill of rights Poor Richard's almanac**
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Science
An underground area of porous rock holds water. What is this area of rock called?(1 point) a desert a plain an aquifer a farm
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Physical Science
Moving from the element with atomic number 10 to atomic number 11 on the periodic table, there is a change in reactivity. In three to five sentences, identify the direction of the change, and give two reasons for the change.
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Science
A molecule of ethanol has two carbon atoms, six hydrogen atoms, and one oxygen atom. A ball-and-stick model of ethanol is made from the following components: -One red ball -Two black balls -Six white balls -Eight sticks What do the black balls in the model
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Science
1. As the pressure of an enclosed gas decreases to half its original value, what happens to the volume of the gas if temperature is held constant?(1 point) The volume decreases to half of its original value. The volume decreases to one-fourth of its
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Algebra
The right arrow symbol used to show the transition from a point to its image after a transformation is not contained within the Equation Editor. If such a symbol is needed, type "RightArrow." For example: P(0, 0) RightArrow P′(1, 2). Triangle ABC has
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biology
Compare hypertonic, hypotonic, and isotonic solutions. When an environment is hypotonic, what happens to the cell?1pt a.The cell has more solute, so solvent moves from outside the cell to inside, causing the cell to swell. b.The environment has more
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Science
Which statement about nitrogen (N) and phosphorus (P) is correct? They have the same number of valence electrons. They have the same number of electron shells.*** They are both inert. They are both classified as halogens.
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Check my answers
1. Why was capturing Quebec so important to the British during the French and Indian War? (1 point) By gaining control of Quebec, the British could increase financial and military support from the colonists. By gaining control of Quebec, the British would
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chemistry
Consider the following reaction:4HCl(g)+O2(g)produces 2H2O(g) + 2Cl2(g) How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products? Express your answer as an integer.
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algebra
Determine whether y varies directly with x, If so, find the constant of variation k and write the equation. x y 4 6.4 7 11.2 10 16 13 20.8 Would like for someone to explain if possible
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Language Arts
1. Each winter, I go ice skating with friends from my neighborhood. Sentence*** Fragment 2. We hurry to the ice. Sentence*** Fragment 3. And skate as fast as possible. Sentence Fragment*** 4. Try to catch each other. Sentence Fragment*** 5. Sometimes I
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science
Which result occurs during an exothermic reaction? A.Light is released into the environment, while heat is absorbed. B.Light and heat are absorbed from the environment. C.Heat is released into the environment, while light is absorbed. D.Light and heat are
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Calc
A lighthouse is fixed 130 feet from a straight shoreline. A spotlight revolves at a rate of 11 revolutions per minute, (22 rad/min ), shining a spot along the shoreline as it spins. At what rate is the spot moving when it is along the shoreline 12 feet
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Anyone please help(math)
Which number is a solution of the inequality? g>6.4 a. 7 b. 6 c. 6.4 d. -7 Which number is a solution of the inequality? g+3>6 a. 3 b. 4 c. -3 d. -4 Which number is a solution of the inequality? 12
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English
Choose the answer that best matches the word "serene" I'm fond of autumn in the countryside-it's so serene. beautiful brisk peaceful*** vibrant *** - My Answer
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Language Arts
Which option best describes precise language?(1 point) A. exciting and fascinating B. exact and particular*** C. related to the senses D. having to do with setting Which is an example of informal language?(1 point) A. discovering B. finding out*** C. being
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science
CH4 + 2O2 → CO2 + 2H2O If you change the 2 in front of 2O2 to a 3, what will be the change in the results on the right side of the equation? There are now 3H2O molecules.
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Science/Chemisty
Based on location in the periodic table, which element has chemical properties that are most similar to iodine (I)? A. selenium (Se) B. fluorine (F) C. xenon (Xe) D. calcium (Ca)
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Math
Your class hopes to collect at least 325 cans of food for the annual food drive. There were 135 cans donated the first week and 89 more the second week. a. Write an inequality that describes this situation. Let c represent the number of cans of food that
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calculus
Let f be a differentiable function such that f(3) = 2 and f'(3) = 5. If the tangent line to the graph of f at x = 3 is used to find an approximation to a zero of f, that approximation is? So confused
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math- calc.
what is the 2021st derivative of f(x)=x^(2020)+e^x+sin(x)?
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Math
I’m exercises 1-4, find each sum or difference. 1. 5/10-3/10
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Chemistry
Caluclate the delta H for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of liquid pentane is -146.8kJ/mol. Balanced equation balanced equation: C5H12(l)+8O2(g)-->5CO2+6H2O(g) CO2=393.5 H2O=40.7
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English
Check my answers please 9. The author of "My Brother's Keeper" mainly develops Jamie’s character through his actions *dialogue and thoughts the narrators description other’s reaction to him 10. In "My Brother's Keeper," what does Ted want Jamie to do
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Chemistry
How many kilograms of chlorine are in 30kg of each of the following chlorofluorocarbons (CFC's)? CF2Cl2 -in kg's; CFCl3 -in kg's; C2F3Cl3 -in kg's?
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Science
Over which part of the globe do the prevailing winds blow west to east? (1 point) between 0°S and 30°S latitude between 60°S and 90°S latitude between 30°N and 60°N latitude between 0ºN and 30°N latitude Which is a difference between the trade
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math
how can adding doubles help you multiply by 2?
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Chemistry
Write the equation for the reaction associated with the Ka2 of sulfuric acid, H2SO4. Write the equation for the reaction associated with the Kb2 of carbonate, CO32–.
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calculus
a man on a dock is pulling in a boat by means of a rope attached to the bow of the boat 1ft above the water level and passing through a simple pulley located on a dock 8ft above the water level. if he pulls in the rope at a rate of 2ft/sec, how fast is the
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physics
A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.3 m/s and the tension in the rope is T = 22.4 N. 1. What is the mass? 2. If the
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Social Studies
Drag the types of government to the correct nation. Words may be used once, more than once or not at all. parliamentary democracy autocracy presidential democracy monarchy Kenya South Africa Nigeria Equatorial Guinea
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Physics
Two dogs pull horizontally on ropes attached to a post; the angle problem 1 between the ropes is 60.0 degrees. If dog A exerts a force of 270N and dog B exerts a force of 300N find the magnitude of the resultant force and the angle it makes with dog A's
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Chemistry
A mixture of C3H8 and C2H2 has a mass of 2.6g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. Find the mass of C2H2 in the original mixture.
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chemistry
What is the percent yield if 23.5 of ethyl chloride is actually formed?
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Math
You invest $500 at an annual interest rate of 6.75% compounded continuously. How long will it take y our money to double?
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chemistry
Balancing Redox Reaction in Basic Solution CN- + MnO-4 --> CNO- + MnO2 H2O + CN- --> CNO- + 2H +2e 3e + 4H + MnO4- --> MnO2 + 2H2O My confusion is with adding the OH- please explain
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math
In a certain class there are 12 boys and 18 girls. If the class average for an algebra exam is 90 and the boys' average score is 87, what is the girls' average score?
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WGeo connexusTCAH
Which phrase best describes the term precision agriculture?
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science
What happens to air pressure and the amount of oxygen as the altitude increases in Earth’s atmosphere?(1 point) 1. Both air pressure and the amount of oxygen increase. 2. Both air pressure and the amount of oxygen decrease. 3. Air pressure increases,
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english
Which phrase gives the definition of a medium?(1 point) someone who communicates well with others a size of something a way to present information something not too hard or too easy
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Language arts
What is one reason you might want to write a letter?(1 point) A. to argue with a colleague B. to ask about borrowing money C. to make a purchase D. to register a complaint
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science
Which characteristics are considered most typical of an old galaxy in decline?
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sociacl studies
Drag and drop the words to complete the sentences. alliancescoloniesbelief systemsnatural resourcestechnologies Beginning in the 1500s, European nations conquered most of Southeast Asia to set up . They built ports and cities to export the region’s for
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Science
1.) Where is most of the baryonic matter (ordinary matter) of the universe found?(1 point) > in interstellar gases and stars > in planets and natural satellites > in dark matter and dark energy > in comets and asteroids 2.) When parts of a gas cloud
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social studies
Which natural resource from West Africa had a significant impact on the growth of Ghana? A. gold B. salt C. silver D. wood
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economics
Vicky has worked for the same company since January 2011. Her starting salary was $52,000 and she has received a $1,000 raise on the first day of each year. How much is her salary today?
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geography
True or False: LEDCs have become attractive sites for manufacturing and tertiary services such as help lines because of lower labor costs and access to information technology
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Animation
Please help me check before I submit. Which of the following refers to moving or still images that are made by, or with the assistance of, computers for example, maps, architectural drawings, print graphics, logos and titles, or product renderings? A.
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Science | Earth's Changing Surface |
3 . Which feature is formed at convergent plate boundaries? A. San Andreas B. East African Rift Valley C. mid-Atlantic Ridge D. Andes Mountains Some please help! I don't rlly understand this question or please tell meh the answer or all the answers.. ;w;