The motion of the piston can be approximated by the function h(t) = 0.05cos13t, where t is time in seconds, and h(t) is the displacement of the piston head from rest position, in metres, at time t. (a) Determine an equation for the velocity of the piston head as a function of time.
[1]

(b) Find the maximum and minimum velocities, and the times at which they occur
using k ∈ Z. [4] (Hint: critical numbers come from the derivative of the function you are trying to find max/mins for)

This figure consists of a rectangle and semicircle. what is the perimeter of this figure use 3.14 for pi 60.84m 72.84m 79.68m 98.52m

If the class was going to get a class pet and 5 picked fish and 7 pick bird and 8 picked rabbits have many students were in the

Me max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.