Consider a sample of golf balls. their diameters are measured and found to have a standard deviation of 0.72. give a point estimate for the population standard deviation in diameters of golf balls. round your answer to two decimal places, if necessary.

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.