Solve the problem. Round your answer, if appropriate.The volume of a sphere is increasing at a rate of 5 cm3/sec. Find the rate of change of its surface area when its volume is 
cm3. (Do not round your answer.)
A. 
cm2/sec
B. 2 cm2/sec
C. 10? cm2/sec
D. 
cm2/sec
Answer: B
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Solve the problem.Find a vector of magnitude 3 in the direction opposite to the direction of v = 
i + 
j - 
k.
A. 5
B. 3
C. 5
D. 5
Use an Euler diagram to determine whether the argument is valid or invalid.Some TV shows are comedies.All comedies are hits. Some TV shows are hits.
A. Valid B. Invalid
Answer the question.A teacher bought a package of 48 markers for her first-grade class. After one school year, 33 markers were still working. What fraction of the package of markers was working? Express the result using a simple, convenient fraction that is close in value to the exact answer.
A. 
B. 
C. 
D. 
Solve the problem.Consider the following simplified digital photograph that has a 3 × 3 grid with four gray levels numbered from 0 to 3. It shows a letter Y in dark gray on a white background.
Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix which represents the entire picture becoming one gray level darker.
A. 
B. 
C. 
D. 