Solve the problem.If an object is propelled upward from a height of 144 feet at an initial velocity of 128 feet per second, then its height after t seconds is given by the equation 
After how many seconds does the object hit the ground?
A. 9 sec
B. 11 sec
C. 4.5 sec
D. 8.0 sec
Answer: A
Mathematics
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. 2 B. 1 C. 0 D. No limit
Mathematics
Choose the most reasonable unit of measure.Paperback book height: 24 
(mm, cm, m, km)
A. km B. mm C. cm D. m
Mathematics
Express the function in terms of x.If f(u) = u4/3 and u = x7 - 3, then express 
u1/3 ? 7x6 in terms of x alone.
A. 
6
B. 
x6
C. 
x6
D. 
Mathematics
Solve the problem.Find f(k - 1) when f(x) = 3x2 - 4x - 1.
A. 3k2 - 10k + 6 B. -10k2 + 3k + 6 C. 3k2 - 7k - 2 D. 3k2 - 10k - 2
Mathematics