Solve.Neglecting air resistance, the distance d, in feet, that an object falls in t seconds is given by the equation 
If a window washer drops her bucket from the roof of a 400-foot building, how long will it take the bucket to hit the ground?
A. 
sec
B. 6 sec
C. 5 sec
D. 
sec
Answer: C
Mathematics
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Solve the problem.Write parametric equations for the tangent line to the surface 
at the point 
whose projection on the xy-plane is parallel to the y-axis.
A. 
B. 
C. 
D. 
Mathematics
Use a truth table to determine whether the argument is valid.p ? qq p
A. Valid B. Invalid
Mathematics
Find the limit.
x-3/ln x
A. -3
B. 
C. 
D. e3
Mathematics
Find the derivative of the function.
?
?
A. 
B. 
C. 
D. 
Mathematics