Combine. Assume that all variables represent non-negative real numbers.2
- 5
A. -23
B. -27
C. 23
D. -3
Answer: A
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Solve the problem.The radius, r, of a sphere can be found using the formula 
where S is the surface area. If the surface area is 5007 square inches, what is the radius? (Use ? ? 3.14 and round to the nearest tenth.)
A. 35.4 in. B. 20.0 in. C. 62.7 in. D. 40.0 in.
Solve the problem. Round your answer, if appropriate.As the zoom lens in a camera moves in and out, the size of the rectangular image changes. Assume that the current image is 7 cm × 6 cm. Find the rate at which the area of the image is changing (dA/df) if the length of the image is changing at 0.6 cm/s and the width of the image is changing at 0.3 cm/s.
A. 12.0 cm2/sec B. 11.4 cm2/sec C. 6.0 cm2/sec D. 5.7 cm2/sec
Perform the matrix operation.Given B = 
, find (-2)B.
A. 
B. 
C. 
D. 
If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth.644/3
A. 4096 B. 1024 C. 256 D. 16,384