Solve the problem.A rock falls from a tower that is 480 ft high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground (h=0)?
A. 14,400 s
B. 21.9 s
C. 21.5 s
D. 5.5 s
Answer: D
Mathematics
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Perform the indicated operations:
?
?
A. –9 B. –19 C. 19 D. 9
Mathematics
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 5
+ 6
A. 17
B. 11
C. 7
D. -17
Mathematics
Answer the question.For f(x) = 2x + 6 and g(x) = 5
, what is the domain of f?g?
A. 
B. All real numbers
C. 
D. 
Mathematics
Solve the problem.A land developer wants to develop 8 acres of land. Each lot in the development is to be 
of an acre. How many lots will the land developer have in the 8 acres?
A. 
lot
B. 1
lots
C. 2
lot(s)
D. 28 lots
Mathematics