An offshore oil well is leaking oil and creating a circular oil slick. if the radius of the slick is growing at a rate of 5 miles/hour, find the rate at which the area is increasing when the radius is 6 miles.

Can some one me with these questions

With alll of except for the 2 that i did already

Miss henderson wants to build a fence around a rectangular garden in her backyard in the scale drawing the perimeter of the garden is 14 in of the actual length of a b is 20 ft how many feet of fencing what you need