The mass. in grams. ofthe rst 3: metres of a wire is represented by the function f [1) = #31: 2 a] Determine the average linear density of the part of the wire from x =2 to x: 4. h] Determine the linear density at x: E and at x: 9, and compare the densities at the two points. What do these values conrm about the wire? The owner of a local hair salon is planning to raise the price for a haircut and blow dry. The current rate is $310 for this service with the salon averaging 55!] clients a month. A survey:r indicates that the salon will lose 5 clients for everv incremental price increase of $2.51 a} Write an equation that models the salon's monthly revenue, R, as a function of x, where x represents the number of 52.5[1 increases in the price. h} Use the product rule to determine R'lv]. c] Evaluate H13} and interpret its meaning for this situation. d} Solve Wis}