Solve the problem.The position(in feet) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. Find the object's velocity at time t.
A. v = A
cos 
ft/sec
B. v = - A
cos 
ft/sec
C. v = A
cos 
ft/sec
D. v = A cos 
ft/sec
Answer: C
Mathematics
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Factor the polynomial completely.- 639x2 + 63x3 + 648x
A. x(9x - 9)(7x - 8) B. prime C. 9x(x - 9)(7x - 8) D. 9x(x + 9)(7x + 8)
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Decide what values of the variable cannot possibly be solutions for the equation.
- 
= 
A. -3, 0, 9 B. -9, 3 C. -3, 9, -27 D. -9, 0, 3
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Add.-19 + (-5) + (-12) + (-16) + 11 + (-17)
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