Write each comparison as a rate. a)there was 15mm of rain over three days. b)four chocolate bars were on sale for $2.20. c)indu saves $14.00 every week. d)philip's height changed by 12cm over 4 months.

Taking algebra two apex courses and need with these questions

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Describe the domain and range of y=2(3)^x-2+5