#13 The radius of a sphecical blloon is increasing at the cate of 3inches per second, How fast is its Surface changing when the radius is 12 inches ?

Give your answer accurate to 3 decimal places. Gas is escaping from a spherical balloon at the rate of 12 ft/hr. At what rate (in feet per hour) is the radius of the balloon decreasing when the volume is 300 ft? ft/hr

A parked car dripping transmission fluid is creating a circular puddle whose area (in square inches) is A = ² where r is the radius of the circle in inches. Find the rate at which the area of the puddle is increasing at the instant when the radius is 18 inches and increasing at a rate of 4 inches per minute. When the radius is 18 inches, the area is changing at approximately (Round to the nearest thousandth as needed.) square inches per minute.

The area of a circle increases at a rate of 2 cm² /s. How fast is the radius changing when the radius is 5cm? a) Draw the picture. b) Write the given and unknown derivatives in d/dt notation. c) Label the variables. d) Proceed to solve and finish the problem. Reminder, keep solutions and answer in exact form and don't forget the units on the final answer.