Solve the problem.A pulley of radius 25 cm rotates 7 times in 4 sec. Find the angular speed of the pulley.
A. 
radians per sec
B. 
radians per sec
C. 
radian per sec
D. 
radian per sec
Answer: A
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Evaluate the integral using the given substitution.
dx , u = x5 - 3
A. 
(x5 - 3)5 + C
B. 
x25 - 3 + C
C. 
(x5 - 3)3 + C
D. 
(x5 - 3)5 + C
Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. x = 3
B. x = 
C. x = 3
D. x = 4
An amplifier produces an output of 7 volts when the input signal is 0.15 volt. Find the decibel voltage gain. Round to the nearest whole number. ?
A. 17 db B. 33 db C. 77 db D. 50 db E. 38 db
Solve.John owns a hotdog stand. He has found that his profit is represented by the equation 
with P being the profit in dollars, and x the number of hotdogs sold. How many hotdogs must he sell to earn the most profit?
A. 39 hotdogs B. 40 hotdogs C. 20 hotdogs D. 41 hotdogs