Solve the problem.The volume V of a right circular cylinder of height 2 and radius r is V(r) = 2?r2. Find the instantaneous rate of change of volume with respect to radius r when r = 7.
A. 28? ft3/ft
B. 23? ft3/ft
C. 98? ft3/ft
D. 32? ft3/ft
Answer: A
Mathematics
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Solve the problem.Since cos 
= 
and 
is in the interval [0, ?], cos-1 
=
A. 
B. 
C. - 
D. 4
Mathematics
Solve the problem using the elimination method.A salesman sold $250 more than the rest of the sales staff. If the sales total for the day was $1300, how much did the rest of the sales staff sell?
A. $1050 B. $525 C. $650 D. $775
Mathematics
Find the principal square root of the number. Approximate the answer to the nearest hundredth whenever appropriate.36
A. -6, 6 B. 1296 C. 12 D. 6
Mathematics
Find the sum or difference.
- 
A. 
B. -1
C. 
D. 
Mathematics