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Jack
Questions and answers by visitors named
Jack
, page 5
Questions (1,125)
Writeacher, I need you help to rephrase and answer a question on the use of children in advertising.
1) I need to rephrase this:
1 answer
442 views
What mass of chromium II chlroide (CrCl2) is dissolved in 150.0mL of solution to prepare .250M solution?
Please Help
4 answers
468 views
Please help me with my physics homework I've been given a week and can't for the life of me work out how it is done.
Tom has a
1 answer
389 views
A ball is thrown vertically upwards in the air at a velocity of 50(m/s) and reaches a maximum height of 20(m). Calculate the
2 answers
949 views
If a bow with a draw weight of 60 kilograms were to fire at someone 5 meters away but the user had to roll first before drawing
1 answer
452 views
Starting with the kinematics equation x = vot + ½ at^2, derive an expresion relating the acceleration and initial velocity of
2 answers
519 views
A skateboarder shoots off a ramp with a velocity of 6.8 m/s, directed at an angle of 56° above the horizontal. The end of the
2 answers
708 views
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a
2 answers
894 views
A major-league pitcher can throw a baseball in excess of 46.6 m/s. If a ball is thrown horizontally at this speed, how much will
1 answer
456 views
Rays PQ and QR are perpindicular. Point S lies i the interior of angle PQR. If the measure of the angle SQR=4+7a and the measure
3 answers
863 views
Ally loves the beach and decides to spend the summer selling various ice cream products on the beach. From her account course,
1 answer
418 views
2x^2 + 5x - 8 = 0
Solve the quadratic equation by completing the square.
3 answers
1,218 views
2x^2 + 5x - 8 = 0
Solve the quadratic equation by completing the square.
1 answer
432 views
A 34.05 gram liquid sample of an unstable compound is deposited in a metal piston assembly that has a cylinder with a diameter
1 answer
658 views
If someone could help me, I am truly desperate here. I am struggle with this problem.
– Simple Linear Regression Applications
1 answer
427 views
How do you make this true
Using 48, 6, 2, and 5 =18 by using (+, -, x, or /)
3 answers
240 views
Find the derivative of y=15x^7+7^x+22
3 answers
353 views
Given F(2)=1,F'(2)=5,F(4)=3,F'(4)=7 and G(4)=2,G'(4)=6,G(3)=4,G'(3)=8, find:
a)H(4)if H(x)= F(G(x)) b)H'(4)if H(x)= F(G(x))
3 answers
312 views
two blocks of masses m1 and m2 (m1>m2) are placed on a frictionless table in contact with each other. A horizontal force of
3 answers
2,650 views
The total length y is a linear function of the tail length x with great accuracy. The domain is the interval from 30mm to 200mm,
2 answers
979 views
Julie is solving the equation x2 + 6x + 9 = 0 and notices that the discriminant b2 - 4ac has a value of 0. This tells her that
2 answers
693 views
DES and AES are both “turn the handle” algorithms, in that they use repetition of some number of very similar cycles. What
1 answer
446 views
Draw a flowchart for a program that reads a date in an 8-digit sequence (month, day, year) and determines if the date is a valid
2 answers
638 views
You set out to design a car that uses the energy stored in a flywheel consisting of a uniform 97-kg cylinder of radius R that
1 answer
440 views
Why does crotyl chloride react faster than 1-chlorobutane in ethanol, since both are primary alkyl halides?
2 answers
1,136 views
A long jumper leaves the ground at an angle
of 24.3◦ to the horizontal and at a speed of 10.6 m/s. How far does he jump?
2 answers
554 views
HOW CAN I SOLVE THE INEQUALITY GRAPHICALLY 3X^2 + 10X - 8 > 0
Any help would be appreciated
1 answer
434 views
It is calculated that 0.0191 moles of CO2 are expected from a reaction at 25 degrees C and 1 atm. What volume of CO2 does this
3 answers
1,130 views
An experiment that led to the formation of the new field of organic chemistry involved the synthesis of urea, CN2H4O, by the
3 answers
1,027 views
Lead(II) oxide from an ore can be reduced to elemental lead by heating in a furnace with carbon.
PbO(s) + C(s)= Pb(l) + CO(g)
3 answers
944 views
A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation
2 answers
1,194 views
A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation
1 answer
411 views
If 1.00 mole of BrCl is introduced into a 500.0 ml flask, what are the concentrations of Br2, Cl2 and BrCl at equailbrium
2 answers
795 views
I am stuck on several probability questions.
A spinner that has 15 equal sized sections numbered 1 to 15 is spun twice. What is
4 answers
2,295 views
A circular plate of radius r feet is submerged vertically in a tank of fluid that weighs w pounds per cubic foot. The center of
1 answer
645 views
Please compare and contrast the electrochemical events involved in the initiation and propagation of an action potential with
1 answer
422 views
How much ice is required to cool a 15.0oz drink from 71 F to 34 F, if the heat capacity of the drink is 4.18 J/g*C ? (Assume
4 answers
1,076 views
lim e^(1+h)-e/h
h->0
1 answer
308 views
lim 1/(1+h)^2-1/h
h->0 I have 1 as my final answer and was wondering if i was correct
2 answers
1,036 views
A bouncy ball bounces 16m on its first bounce and then 8m on the second bounce. Each time it bounces the height halves. How high
2 answers
492 views
La familia Gutierrez tiene dos hijos. Ramón tiene 15 años. Es el hijo mayor. Su cumpleaños es el veinte de agosto. Rogelio
3 answers
689 views
1.) ¿Cuál es la prima mayor?
2.) ¿Cuál es la prima menor? 3.) Es el doce de mayo. Es el 20 de agosto. Es el primero de
4 answers
550 views
I have no idea what the answers are to these. Thank You
For questions 10-14, match the family members: A. el hijo de mis tíos B.
6 answers
1,334 views
19. Your hermano mayor is
A.) younger than you. B.) older than you. *C.) more powerful than you. D.) smarter than you. 20. Your
3 answers
406 views
23. Write the correct verb form in the blank: yo/encontrar.
yo ___________ (2 points) 24. Write the correct verb form in the
3 answers
746 views
23. Write the correct verb form in the blank: yo/encontrar.
yo ___________ (2 points) 24. Write the correct verb form in the
2 answers
763 views
A ladder is resting against a wall. The top of the ladder touches the wall at a height of 15 feet and the length of the ladder
3 answers
742 views
if you want to have $7000 in 10 years, how much money must you put in a savings account today? Assume the account pays 4%
1 answer
381 views
1.
Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a
5 answers
2,036 views
Hess's law _____.
A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a
5 answers
1,262 views
A six foot person is walking away from an 18 foot pole. Express the distance between the pole and the person in terms of the
1 answer
495 views
Calculate the concentrations of all species in a 0.690 M Na2SO3 (sodium sulfite) solution. The ionization constants for
3 answers
2,314 views
1. Which of the style guides is most focused on professionals who are writing articles for publication?
A.) MLA B.) APA
7 answers
1,446 views
Please help me. Please show work.
What are the domain and range of the function y=2 square root 3x + 4-5? *A.) X >/= -4/3; Y
3 answers
402 views
For the indicated atom in each of the following molecules or ions, give the number and arrangement of the electron pairs around
4 answers
1,521 views
solve for x: square root 2x+3 = square root 6x - 1.
A.) 1 B.) 2 C.) 3 D.) square root 6 I don't know how to do these so will you
1 answer
444 views
Solve for B: square root b^4/25 = 4.
A.) 2 B.) +/- 5 square root 2 C.) 3 D.) +/- 2 square root 5 I don't know how to do these so
7 answers
839 views
Translate these please:
una zanahoria una manzana una uva una fresa una zanahoria una manzana unas uvas una fresa una manzana la
3 answers
687 views
10.
Fill in the blank with the correct form of the verb: ellos/salir. Ellos ______ Is it: Ellos salen or Is it: Ellos salieron
2 answers
826 views
10.
Fill in the blank with the correct form of the verb: ellos/salir. Ellos ______ Is it: Ellos salen or Is it: Ellos salieron
4 answers
731 views
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our
3 answers
551 views
A rectangular conducting homogeneous (which means the material is the same throughout) block has dimensions 1cm×2cm×3cm . A
1 answer
884 views
Please check. Thank you.
2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+
5 answers
865 views
Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of
1 answer
484 views
Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of
4 answers
506 views
What is the sum of all integer values of n satisfying 1 \leq n \leq 100, such that n^2 - 1 is a product of exactly two distinct
2 answers
872 views
1.
Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an
2 answers
959 views
1.
Which of the following metals is oxidized by calcium ions? *potassium zinc iron lead 2. The first electrochemical cell was
26 answers
5,975 views
5.
Fill in the blank with the correct form of the verb jugar. yo __________ My Answer: yo juego 6. Fill in the blank with the
5 answers
2,211 views
15.
If you do an activity every day, which expression would you use to express that? siempre *todos los días nunca muchas veces
3 answers
544 views
I tried on 8 but i didn't get 9. I do not know how to do these, so please help. Thank You.
8. Which of these sentences is
3 answers
284 views
Events and are mutually exclusive. Suppose event occurs with probability and event occurs with probability .
Compute the
1 answer
1,072 views
An ordered triple of real numbers
(a,b,c) is called friendly, if each number is equal to the product of the other 2. How many
1 answer
415 views
An ordered triple of real numbers
(a,b,c) is called friendly, if each number is equal to the product of the other 2. How many
3 answers
533 views
If the polynomial, x^4 - 6x^3 + 16x^2 - 25x + 10 is divided by another polynomial x^2 - 2x + k, the remainder comes out to be x
2 answers
584 views
This time three questions - 1. If (x^2 - 1 ) is a factor of polynomial ax^4 + bx^3 + cx^2 + dx + e, show that a + c + e = b + d
3 answers
541 views
This time three questions - 1. If (x^2 - 1 ) is a factor of polynomial ax^4 + bx^3 + cx^2 + dx + e, show that a + c + e = b + d
3 answers
611 views
A 50g tennis ball is thrown with a velocity of 12 m/s. It strikes a wall and rebounds with a velocity of 10 m/s.
a) What is the
1 answer
707 views
From a height of 30.5 , a 1.45 bird dives (from rest) into a small fish tank containing 49.0 of water. What is the maximum rise
1 answer
1,162 views
What is the radius of an automobile tire that makes a complete turn in 0.1 sec and has a linear speed of 24.0 m/s?
1 answer
428 views
The class average on a math test was 82 and there are 8 students in the class. If seven of the scores are 80, 90, 78, 100, 76,
4 answers
586 views
What is the median and the 1st or lower quartile of the following data:
4, 12, 15, 20, 24, 30, 32, 35
2 answers
779 views
Using the equipment below, explain how to prepare a .00052 HCL solution farom a regent bottle containing .13 HCL using only the
1 answer
468 views
An executive flew in the corporate jet to a meeting in a city 1700 kilometers away. After traveling the same amount of time on
3 answers
1,407 views
A pharmaceutical salesperson receives a monthly salary of $2480 plus a commission of 7% of sales. Write a linear equation for
2 answers
1,149 views
A rancher has 100 meters of fencing to enclose two adjacent rectangular corrals (see figure). The rancher wants the enclosed
2 answers
982 views
Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity
5 answers
8,067 views
The demand equation for a product is p = 60 – 0.0004x, where p is the price per unit and x is the number of units sold. The
2 answers
931 views
Find all solutions of the equation. Check your solutions in the original equation. (Enter your answers from smallest to largest.
1 answer
462 views
Find an equation that has the given solutions. (There are many correct answers.)
-1/6, -8/9
1 answer
416 views
Find the equation of the parabola
y = ax2 + bx + c that passes through the points. To verify your result, use a graphing utility
3 answers
1,655 views
Solve system by method of elimination
0.07x + 0.02y =-0.07 0.08x - 0.06y = 0.07
1 answer
364 views
Key: ☺ = My Answer!
2. Write a word phrase for the algebraic expression. 3x - 7 A. The difference of three times a number x and
4 answers
1,948 views
What fact best explains why it is significant that Angelou's narrative is set in 1940?
In 1940, the United States was not yet
39 answers
19,421 views
The length, width, and height of a rectangular box are consecutive integers, and the largest dimension is k cm. find the volume
6 answers
1,974 views
One angle of a quadrilateral has a measure a°. Find the average of a measures of the other three angles.
3 answers
1,363 views
Solve for s
пr(s+r) Solve for a S= a(1-r^n)/1-r
3 answers
342 views
Find an inverse variation equation that models the data. Length 4,6,8,9,10
Weight 24, 16,13,11,9
1 answer
332 views
A car is traveling 28 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes
1 answer
454 views
A car is traveling 28 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes
1 answer
408 views
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