Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
What is the number of tasks in this project?
A. 7
B. 11
C. 6
D. 9
E. none of these
Answer: A
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Solve the problem.If the price charged for a candy bar is p(x) cents, then x thousand candy bars will be sold in a certain city, where p(x) = 141 - 
. How many candy bars must be sold to maximize revenue?
A. 1,974 candy bars B. 1,974 thousand candy bars C. 3,948 thousand candy bars D. 3,948 candy bars
Find the area of the surface generated by revolving the curves about the indicated axis.x = sin t, y = 6 + cos t, 0 ? t ? 2?; x-axis
A. 36?2 B. 18?2 C. 6?2 D. 24?2
Evaluate the integral. 
A. ex[x2 - 6x - 6] + C
B. ex[x2 - 4x + 4] + C
C. ex[x2 - 6x + 6] + C
D. 
x3ex - 2x2ex + C
Express the transform of the given expression in terms of s and ?
.2y" - y' + y, f 
= 1, f' 
= 0
A. 
?
- 2s + 1
B. 
?
- 2s
C. 
?
- 2s + 1
D. 
?
+ 1