Solve.A window washer accidentally drops a bucket from the top of a 64-foot building. The height h of the bucket after t seconds is given by 
When will the bucket hit the ground?
A. 4 sec
B. -2 sec
C. 32 sec
D. 2 sec
Answer: D
Mathematics
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Find the unit tangent vector of the given curve.r(t) = (3t cos t - 3 sin t)j + (3t sin t + 3 cos t)k
A. T = (-3 sin t)j + (3 cos t)k
B. T = (3 cos t)j - (3 sin t)k
C. T = (-sin t)j + (cos t)k
D. T = - 
(sin t)j + 
(cos t)k
Mathematics
Solve and check the equation.6(2x - 8) - 3 = 6(x - 7) + (3)
A. {2} B. {-3} C. {4} D. {-1}
Mathematics
Factor and simplify the expression.
A. sin x + cos x B. csc x tan x C. 1 D. csc2x + tan2x
Mathematics
Determine whether number is rational or irrational.0.
A. Irrational B. Rational
Mathematics