Solve and check.4
= 
A. 
B. 
C. - 
D. - 
Answer: B
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Solve the equation. Round to the nearest tenth, if necessary.A ball is dropped from a cliff that is 224 ft high. The distance S (in feet) that it falls in t seconds is given by the formula S = 16t2. How many seconds will it take for the ball to hit the ground?
A. 15 sec B. 3.7 sec C. 3136 sec D. 14.4 sec
Solve the problem.The position of a body moving on a coordinate line is given by 
with s in meters and t in seconds. When, if ever, during the interval 
does the body change direction?
A. t = 3.5 sec B. t = 7 sec C. no change in direction D. t = 14 sec
Find the derivative of the function.r = 
(4 - ?)
A. 
= - 
- 1
B. 
= 
+ 4
C. 
= 
+ 1
D. 
= ?2 - 1
Express as a sum of logarithms.logr 10T
A. logr 10 + logr T + logr r B. logr 10 + logr T C. log7 r + logT r D. log 10 + log T