Show that the equation is not an identity by listing the value(s) of the variable from among 0, 
, 
, and - 
for which the equation is false.(sin ? + cos ?)2 = 1
A. 0 and 
B. - 
C. 
and - 
D. 
Answer: C
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Solve the problem. Round your answer, if appropriate.The volume of a sphere is increasing at a rate of 8 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. 
cm2/sec
C. 16? cm2/sec
D. 16 cm2/sec
Sketch D and g(D) from the description of D and change of variables 
x = u + v, y = 2u - v where D is the rectangle 0 ? u ? 1, -1 ? v ? 1
?
A.
 ? |  |
B.
 ? |  |
C.
 ? |  |
D.
 ? |  |
An investment of $7,000 earns 6% interest, compounded continuously. What will the investment be worth in 8 years?
A. $11,293.52 B. $11,313.71 C. $11,309.36 D. $11,312.52 E. $11,301.86
Solve the problem.By switching service providers, a family's telephone bill decreased from about 
a month to about $43. By what percent did the monthly bill decrease?
A. 15%
B.
| 7% |
C. 16.3%
D. 14%