Find the volume of the solid generated by revolving the region about the given line.The region in the first quadrant bounded above by the line y = 2, below by the line y = 
, and on the left by the y-axis, about the line y = 2
A. 
?
B. 
?
C. 
?
D. 
?
Answer: A
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Identify the equation as either an identity or not.
= 1
A. Not an identity B. Identity
Decide whether the composite functions, f ? g and g ? f, are equal to x.f(x) = x2 + 3 , g(x) = 
- 3
A. No, yes B. No, no C. Yes, yes D. Yes, no
Add. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Solve the problem.A nuclear scientist has a sample of 
of a radioactive material which has a half-life in hours. She monitors the amount of radioactive material over a period of 30 hours and obtains the following data. Use a graphing utility to fit an exponential function to the data. Round the values to the nearest thousandth. Then, use the function to predict the amount of material, rounded to the nearest tenth, remaining at 40 hours. 
.
A. y = 99.671e0.077x, 2168.7 mg B. y = 99.671e-0.077x, 6.7 mg C. y = 99.671e0.926x, 1.2 mg D. y = 99.671e-0.077x, 4.6 mg