Solve the problem.A formula relating an athlete's vertical leap V, in inches, to hang time t, in seconds, is V(t)= 48t2. A professional basketball player has a vertical leap of 38 inches. What is his hang time? Round your answer to the nearest tenth of a second.
A. 0.8 sec
B. 0.9 sec
C. 0.6 sec
D. 1 sec
Answer: B
Mathematics
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Find the area if the distance between two adjacent dots in a row or column is one unit.
A. 10 B. 6 C. 9 D. 8
Mathematics
Translate the sentence into an equation, then solve.A number x increased by 
is equal to 7.
A. x + 
= 7, x = 7
B. x + 7 = 
, x = - 6
C. x + 
= 7, x = 6
D. 
+ x = 7, x = 2
Mathematics
Multiply and simplify.
? 
A. 2xy
B. 2xy2
C. 2x2y2
D. xy
Mathematics
For the given functions f and g, find (f ? g)(x).f(x) = 5x3 + 2, g(x) = 3x2 - 1
A. 15x5 - 5x3 + 6x2 - 2 B. 15x6 - 5x3 + 6x2 - 2 C. 5x3 + 3x2 - 2 D. 15x5 - 5x4 + 6x2 - 2
Mathematics