I need help with 15 and 7

M E - GO webassignnet/web/Student/Assignment Responses/Last?dep=23694261 W Reluger IT Language . 15 72 POINTS LARAPCALC10 4.3.044. MY NOTES The demand function for a product is modeled by where p is the price per unit (in dollars) and x is the number of units. (a) What price, In dollars, will yield a maximum revenue? (Round your answer to the nearest cont.] (b) what is the maximum revenue (in dollars) at the price found in part (al? (Round your answer to the nearest dollar) 16 -/1 POINTS LARAPCALC10 4.5.004. MY NOTES Find the derivative of the function. (x) = In(4 - * ) 17 -/1 POINTS LARAPCALC10 5.1.047.MI. MY NOTES Find the particular solution that satisfies the differential equation and the Initial condition. Type here to search O e7. -/1 POINTS LARAPCALC10 5.1.047.MI. Find the particular solution that satisfies the differential equation and the initial condition. f'(x) = 20x - 8x; f(1) = 1 Fx) = -/1 POINTS LARAPCALC10 5.1.506.XP. Find the indefinite integral. Check your result by differentiating. (Use C for the constant of integ dx 9x4