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PLEASE HELP ALSO CAN I HAVE THE WORK BC I NEED IT TY

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.

Standard deviation of 19,29,21,22,23

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.