Solve the problem.A foul tip of a baseball is hit straight upward from a height of 4 feet with an initial velocity of 
per second. The function 
+ 4 describes the ball's height above the ground, s(t), in feet, t seconds after it was hit. What is the instantaneous speed of the ball 3.7 seconds after it was hit?
A. -118.4
B. -25.6
C. 25.6
D. 118.4
Answer: C
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Find a linear model for the following data table. Round your answer to two decimal places, if necessary. x 3 4.36 5.72 7.08 y 17 12.85 8.7 4.55?
A. 
B. ?
C. ?
D. ?
The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (10 sin 5t)i - (7 cos 5t)j + (10 csc 5t)k
A. a
= 175j + 250k
B. a
= -250i - 250k
C. a
= -250i + 250k
D. a
= 250i + 250k
Using a sum or difference identity, write the following as an expression involving functions of ?.tan 
A. -tan ?
B. 
C. 
D. tan ?
The Acme Class Ring Company designs and sells two types of rings: the VIP and the SST. They can produce up to 24 rings each day using up to 60 total man-hours of labor. It takes 3 man-hours to make one VIP ring, versus 2 man-hours to make one SST ring.How many of each type of ring should be made daily in order to maximize the company's profit, if the profit on a VIP ring is $50 and the profit on an SST ring is $40?
A. 10 VIP and 14 SST B. 20 VIP and 4 SST C. 12 VIP and 12 SST D. 14 VIP and 10 SST