Solve the problem.The function V(r) = 4?r2 describes the volume of a right circular cylinder of height 4 feet and radius r feet. Find the instantaneous rate of change of the volume with respect to the radius when r = 11. Leave answer in terms of 
A. 44? cubic feet per feet
B. 8? cubic feet per feet
C. 88? cubic feet per feet
D. 22? cubic feet per feet
Answer: C
Mathematics
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Find the derivative of y.y = -2t3 tanh 
A. -6t2 tanh 
+ 4 sech 
B. -6t2 tanh 
+ 4 sech2 
C. -6t2 tanh 
- 4 sech2 
D. -6t2 tanh 
+ 2 sech2 
Mathematics
State the real number that corresponds to the situation.Mr. Voss increased his speed by 19 miles per hour.
A. 19 B. -19
Mathematics
Determine the degree of the polynomial.3t6 + 4t3 + 5 - 3t2
A. 6 B. 4 C. 12 D. 11
Mathematics
Solve the problem.Write 310 out of 500 war veterans as a reduced fraction and as a percent.
A. 
, 620%
B. 
, 620%
C. 
, 62%
D. 
, 6.2%
Mathematics