Solve the problem.If an object is thrown upward with an initial velocity of 10 feet per second, then its height is given by h = -10t2 + 60t. After how many seconds does it hit the ground?
A. 10 sec
B. 20 sec
C. 6 sec
D. 3 sec
Answer: C
Mathematics
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For ?ABC, given the measures of ?A and ?B, find the measure of ?C.?A = 28.9° and ?B = 62.8°
A. ?C = 91.7° B. ?C = 88.3° C. ?C = 89.3° D. ?C = 98.3°
Mathematics
Determine whether the given function is one-to-one. If it is one-to-one, find a formula for the inverse.f(x) = 
A. f-1(x) = x3 + 27
B. f-1(x) = x3 - 27
C. f-1(x) = 
D. Not one-to-one
Mathematics
Factor completely.x5y3 - 4x4y4 - 21x3y5
A. x3y3(x - 7y)(x + y) B. x3y3(x + y)(x - 3y) C. x3y3(x + 7y)(x - 3y) D. x3y3(x - 7y)(x + 3y)
Mathematics
Perform the indicated operation and simplify.
÷ 
A. z - 6
B. 
C. 
D. 
Mathematics