The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = -5 + 9 cos tFind the body's velocity at time t = ?/3 sec.
A. - 
m/sec
B. 
m/sec
C. 
m/sec
D. - 
m/sec
Answer: D
Mathematics
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Match the function with one of the graphs.f(x) = ex - 5
A. 
B. 
C. 
D. 
Mathematics
Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves about the given lines.y = 2x,
y = 0,
x = 2; revolve about the x-axis
A. 
?
B. 
C. 
?
D. 
?
Mathematics
Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75 B. $2.00 C. -$3.00 D. $3.00
Mathematics
Simplify. Assume that no radicands were formed by raising negative quantities to even powers.3
+ 9
A. 12
B. 84
C. 27
D. 12
Mathematics