Suppose that fluid is leaking from an overhead pipe and spreading in the shape of a circle on the ground. If the radius of the Circle is increasing at a rate of 0.5 feet per minute, how fast is the area of the circle increasrng when the radius is 8 feet? ftz/min X Recall that to find the rate at which the area of the circle changes with respect to the radius, it is necessary to find a relationship between the two quantities. Sketch the described situation and assign the variables A, r, and t to the area of the circle, the radius, and time, respectively. What is the formula relating the area of a circle and its radius? How can this relation be used to find an expression d_A - 7 for or in termsrand d' Submit Answer 3. [-/1 Points] PRACTICE ANOTHER A road running north to south crosses a road going east to west at the point P. Car A is driving north along the first road, and car Bis driving east along the second road. At a particular time carA is 10 kilometers to the north of P and traveling at 55 km/hr, while car B is 15 kilometers to the east of P and traveling at 85 km/hr. How fast is the distance between the two cars changing? km/hr