Help! I think it’s d but I don’t know

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.

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days