Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the y-axis.y = 
, y = 0, x = 7, x = 9
A. 30?
B. 10?
C. 20?
D. 15?
Answer: C
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The life expectancy E, in solar lifetimes, of certain stars depends on their mass M, in solar masses. The relationship is
.
As mass increases, life expectancy decreases. What can you say about the rate of decrease? A graph of E versus M can help you answer this question.
?
A. Life expectancy decreases at a decreasing rate. B. Life expectancy decreases at an increasing rate. C. Life expectancy reaches a point of inflection. D. None of the above.
Use the graph to estimate the specified limit.
f(x) and
f(x)
A. -1; -1 B. 1; 1 C. 1; -1 D. -1; 1
Given f(x) and g(x), perform the indicated operation.f(x) = 11
; g(x) = 3
- 8Find 
(x).
A. 
, x ? 
B. 
, x ? - 
C. 
, x ? 
D. 
, x ? - 
Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability.Both marbles are green.
A. 
B. 
C. 
D. 