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Dave
Questions and answers by
Dave
, page 4
Questions (497)
A boat has a speed of 4 m s
−1 (relative to the surrounding water) and a heading of 170◦ . There is a current flowing from a
3 answers
583 views
Length of a side on a square is 5cm longer than the side of another square. the total area is 193cm. what is length of original?
2 answers
483 views
Isaac wants to enclose his backyard with a fence that is bounded on one side by the back of the house. if he has 164 feet of
2 answers
1,106 views
Reflecting telescopes are popular because they're
A. more durable than a refracting telescope. B. easier to build than a
2 answers
552 views
The statement "matter can be neither created nor destroyed by chemical means, but it can be changed from one form to another" is
4 answers
1,304 views
A solution that contains a large amount of salt and a small amount of water is said to be a _______ solution.
A. unsaturated B.
6 answers
764 views
The main difference between the internal combustion engine and the diesel engine is that the diesel engine
A. does not have a
2 answers
1,239 views
Find the principal when the amount in the account is 11,000 and rate of interest is 3.45 percent compounded interest is
2 answers
497 views
Regarding Indonesia, which of the following statements is false?
A. Indonesia was formerly the British East Indies. B. The first
9 answers
982 views
A hockey player is initially moving at 5.00m s to the east. Her mass is 50.0 kg. She intercepts and catches on her stick a puck
1 answer
1,055 views
Which of the following directly led to the American Civil War?
A. The Lecompton Constitution B. The secession of many Southern
5 answers
664 views
American soldiers first faced guerilla tactics during which war?
A. Philippine-American War B. World War II C. Vietnam War D.
4 answers
727 views
Which statement best describes the Monroe Doctrine?
A. The United States welcomed European involvement in all issues in North
7 answers
3,416 views
If XYZ stock is quoted at 523/4 per share, what is the market price per share
A. $52.75 B. $52.34 C. $275.00 D. $75.00? A?
4 answers
409 views
If a tank contains water 4 m deep, what is the pressure at the bottom of the tank? (Neglect the atmospheric pressure.)
A. 39.2
3 answers
1,073 views
What is the mass of a child if the force of gravity on the child's body is 100 N?
A. 9.8 kg B. 4.45 kg C. 22.5 kg D. 10.2 kg
3 answers
512 views
A ray of light traveling in air strikes the midpoint of one face of an equiangular glass prism (n = 1.74) at an angle of exactly
2 answers
1,027 views
How many milliliters of a 5.0 M H2SO4 stock solution would you need to prepare 111.0 mL of 0.36 M H2SO4?
2 answers
855 views
What is the molarity of a bleach solution containing 6.6 g of NaOCl per liter of bleach?
answer please
2 answers
758 views
I have 59.73 grams of a solid dissolved into water. The total is now 115ML of water. I added the water into a beaker already
3 answers
465 views
Find r in a geometric sequence if A=2 and A10=1024
2 answers
620 views
A cubical Gaussian surface surrounds three positive charges, each has a charge q1 = +4.00 × 10-12 C, and two negative charges,
3 answers
2,000 views
Find the area of a triangle with base of 15 m and altitude of 12 m
2 answers
494 views
if 1.37 moles of Pb(NO3)2 is mixed with 2.56 moles of KI, how many moles of PbI2 are produced?
2 answers
521 views
Find x
1) x^2*23y^2 = 1.78x10^32*z 2) 1.3*10^-4 x=4.7/x -6.3*10^-3 Please help
3 answers
364 views
I need some help with my maths questions please!
What angle does the tangent to the curve y=x^4-x^3+7x make with the positive
2 answers
602 views
The above function is given:
f(x)= sqrt of (2x-6)/(x-8) - Sarah describes the domain as [3, ∞). - Describe why her domain is
4 answers
876 views
Gloria would like to construct a box with volume of exactly 45ft^3 using only metal and wood. The metal costs $15/ft^2 and the
5 answers
4,340 views
A man doing a slow push-up is approximately in static equilibrium. His body is horizontal, with his weight of 750 N supported by
2 answers
522 views
A certain concrete will support a maximum compressive stress of 1.30 107 N/m2 before being crushed. A column of uniform width is
2 answers
856 views
A watertight car is submerged under water. What force is required to open a door of area 1.12 m2 if the average depth of water
2 answers
630 views
Find the volume occupied by 3.14 moles of an ideal gas at standard conditions of pressure and temperature (P = 1.00 atm, T = 273
1 answer
435 views
By how much does the air pressure in a house increase if the house is sealed and the air temperature increases from 10.7° C to
1 answer
410 views
A 1.05 liter flask contains a certain quantity of ideal gas at 305 K. Then an equal number of molecules of the same gas is added
2 answers
541 views
A brick is initially 12.90 cm high and an aluminum can is initially 12.91 cm high. By how much must their temperatures be raised
1 answer
485 views
What is the percentage chance that the same number can be pulled twice when there are 12 numbers in a hopper? If the number that
1 answer
332 views
Lim sin(60-x)/2cosx-1 x approaches 60
3 answers
946 views
Celeste just borrowed 47,500 dollars. She plans to repay this loan by making equal quarterly payments of 3,126.28 dollars for 19
1 answer
467 views
Can somebody show or explain this to me:
Change 6 2/3% to fraction and .6 1/3 to a decimal or fraction.
2 answers
546 views
a 12-ft-long guy wire is attached to a telephone pole 10.5 ft from the too of the pole. If the water forms a 52 degree angle
3 answers
868 views
Of 450 lunches old at school on Thursday, 40% were hamburgers and the rest were pizza. How many more pizza lunches were sold
4 answers
868 views
What set of hybrid orbitals is used by Xe in XeO3F2?
dsp2 d2sp3 sp3 dsp3 d2sp
2 answers
1,130 views
What type of orbitals are used to form the N–N bond in hydrazine, N2H4?
3 answers
599 views
How do I Factor the expression
a y - a^{6} y^{6} ?
3 answers
339 views
A sample of water is known to contain 1.51 × 10^24 H2O molecules. How many moles of H2O molecules are present in the sample?
2 answers
1,286 views
a sum to infinity which is three times the first term. find the first term
2 answers
781 views
The worker pushes with a force of 10 N that points downward at an angle of 45° below the horizontal. What component of the
2 answers
817 views
A pharmaceutical salesperson receives a monthly salary of $2500 plus a commission of 7 percent of sales. Write a linear equation
2 answers
975 views
To become a law, typically a bill must be approved by:
a. The House of Representatives, the Senate, and the President b. The
1 answer
460 views
Our rights are sometimes restricted in order to protect:
a. those that are offended easily b. health, safety, and moral standards
6 answers
416 views
Which of the following is NOT part of the naturalization process?
a. Filing a Declaration of Intention b. Taking a US history,
10 answers
2,290 views
What limits the amount of legal immigrants to our country?
a. Tariffs b. Census c. Quotas d. Passports I couldn't find this
4 answers
587 views
To become a law, typically a bill must be approved by:
a. The House of Representatives, the Senate, and the President b. The
2 answers
530 views
To become a law, typically a bill must be approved by:
a. The House of Representatives, the Senate, and the President b. The
1 answer
482 views
I have a wheel 40 cm diameter that has 200 N m of torque, assuming there is no slippage what would the force of the wheel on the
1 answer
356 views
They systematic raiding of the Athapascans shows that organized warfare is most clearly identified with:
a. there is no record of
2 answers
560 views
Teotihuacan like other early urban civilizations was
a. self sustaining and unconcerned with long distance trade as a result of
3 answers
574 views
The map of northeastern region of North America shows the tribes of the Iroquois Confederacy:
a. in a staked formation south of
2 answers
556 views
They systematic raiding of the Athapascans shows that organized warfare is most clearly identified with:
a. there is no record of
4 answers
637 views
The limit as x approaches negative infinity is
(3x^5 + x + 2) / (8x^4 - 5) a. DNE b. 0 c. -3/8 d. 3/8 I think the answer is
3 answers
357 views
Construct a function f : R
2 ¡æ R such that its saddle points are given by {(n, 2m+1−n)|n ¡ô Z, m ¡ô Z}, where Z is the
1 answer
385 views
lim as x approaches negative infinity
(3x^5 + 6x + - 3) / (8x^4 + 10) a. Does Not Exist b. 0 c. -3/8 d. 3/8 I solved this and got
1 answer
358 views
lim as x approaches negative infinity
(3x^5 + 6x + - 3) / (8x^4 + 10) a. Does Not Exist b. 0 c. -3/8 d. 3/8 I solved this and got
1 answer
333 views
Find 2 tangent line equations to the curve y=x^3+x at the points where the slope of the curve is 4.
What is the smallest possible
2 answers
660 views
Find an equation for the tangent line to the curve at (π/2 , 2).
y = 4 + cot(x) - 2csc(x) I am confused how to take the
4 answers
688 views
your derivative is correct.
now just plug in x = π/2 to get the slope remember that tan(π/2) is undefined, BUT cot (π/2) =
1 answer
447 views
Find the inverse of:
y = ((-1) / (x+5)) - 1
1 answer
291 views
your derivative is correct.
now just plug in x = π/2 to get the slope remember that tan(π/2) is undefined, BUT cot (π/2) =
1 answer
487 views
What kind of scenes did artists who gained fame tend to paint in the late eighteenth century. Give an example.
1 answer
348 views
What kind of scenes did artists who gained fame tend to paint in the late eighteenth century. Give an example.
1 answer
373 views
find the lcm for 6, 18
1 answer
295 views
Use the quotient rule to find the derivative of cot x.
I tried to solve this, but somehow I got (sec^2x)/(tanx)^2.
1 answer
435 views
lim (cos(π/4 + h) - cos (π/4))
h->0 _________________________ h Somehow I ended up with cos(1).
3 answers
474 views
Is the step function differentiable in its domain?
I answered it and said that the step function is not differentiable in its
2 answers
639 views
There is a graph of a function that looks like y = x^4 , but it has a vertical asymptote at x = -2 and x = 4.
The question then
1 answer
424 views
lim 200 (30-t)^2
h->0 t=10 The answer should be -8000, but I keep getting -80,000 because I have to do it the long way.
1 answer
290 views
f(x) = x^5 + 2x^3 + x - 1
Find f^-1 (3) and (f^-1)' (3) f^-1 (3) = 1 (f^-1)' (3) = 1/12 Those are the answers, but I have no clue
6 answers
350 views
f(x) = cos(x) + 3x
Find f^-1 (1) and (f^-1)' (1) f^-1 (1) = 0 (f^-1)' (1) = 1/3 These are the answers given, but I also don't
1 answer
345 views
Suppose you titrated a sample of sulfuric acid (diprotic acid) with a 0.250 M solution of NaOH. Given the data in the table
4 answers
3,233 views
If the volume of a cylindrical block is equal to 800cm^3 prove that the total surface area is equal to 2(pi)x^2 + (1600)/x,
1 answer
450 views
A basket ball team scored a total of 160 points. they made 74 baskets. how many 2 point and how many 3 point shots?
1 answer
414 views
Fido weighs 26 pounds more than Fifi. Fifi weighs 12 pounds less than Rover. If the sum of their weights is 71, how much does
7 answers
10,960 views
The region enclosed by the graph e^(x/2), y=1, and x=ln(3) is revolved around the x-axis. Find the volume of the solid
3 answers
1,574 views
Amy leaves home at the same time every morning and gets to school exactly at 8 AM. If she traveled at 70 meters per minute she
2 answers
528 views
Nitrogen monoxide reacts with chlorine gas according to the reaction:
2NO (g) + Cl2 (g) ⇔ 2NOCl (g) Kp = 0.27 at 700 K A
4 answers
2,282 views
Which of the following helped women in the workplace?
A the Civil Rights Act of 1964 B the Voting Rights Act of 1965 C the end of
7 answers
2,286 views
"When the war ended in 1945, two-thirds of all American men between the ages of 18 and 34 were in uniform. Experts feared that
9 answers
2,200 views
I do not understand this problem.
This is part of the question, but I think if I get this part, I'll get the rest. Determine the
7 answers
553 views
The force Fa=(5i+6j+1k) is applied on a material point while it is shifted by 50m in Oxy plane along a direction 20o CCW versus
3 answers
428 views
Given that $x^n - \frac1{x^n}$ is expressible as a polynomial in $x - \frac1x$ with real coefficients only if $n$ is an odd
3 answers
686 views
How do you solve
sin x * cos x = 1/4 I don't know where to start.
1 answer
445 views
the point (3,-4,5), (1,0,5), and (3,1,-2) are three out of four vertices of a parallelogram ABCD. Explain why there are three
2 answers
513 views
1. Why is it important to learn about parenting?
2. To what extent does the average person know about child development and
2 answers
670 views
To edit the text in a smartart graphic, what must be done first ?
7 answers
2,026 views
A runner is jogging at a steady 3.9 km/hr.
When the runner is 7.4 km from the finish line, a bird begins flying from the runner
2 answers
824 views
Use the appropriate reciprocal identity to find the approximate value of sin θ for the given value of csc θ. Use a calculator.
3 answers
4,134 views
Evaluate the integral of
(secx)^2 * (tanx)^3 *dx I started out with letting u=secx and du=secx*tanx*dx , but then I am kind of
2 answers
660 views
Evaluate the integral of 5^t * sin (5^t) *dt
I started out with u = 5^t , but then I got stuck on du because I am not sure how to
4 answers
1,240 views
Evaluate the integral of (sin 2x)/(1+cos^2 x)
1. u=cosx and du=-sinx *dx 2. evaluate the integral of -1/(1+u^2)*du 3. result is
2 answers
584 views
Evaluate the integral of x*(2x+5)^8*dx
I let u=2x+5 and du=2*dx, but then where do I go from there because I can't get rid of the
1 answer
462 views
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