Use polynomial identities to multiply (5 − 4x3)(5 + 4x3). Group of answer choices

25 − 40x3 + 16x6

25 − 4x9

25 − 4x6

25 − 16x6

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.