Acivic group is selling bumper stickers as a fundraiser. during the first week, they sold 600 bumper stickers. during the second week, the group sold 50% more bumper stickers than the first week. during the third week, the group sold 50% fewer bumper stickers than the second week. explain how you can find the percent decrease from the first week's sales to the third week's sales

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.