I am struggling in these question. Please help me, thank you so much!

0 Question 4 v EI/0/1 pt '0 3 8 99 6) Details Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 19 feet high? Recall that the volume of a right circular cone with height h 1 and radius of the base r is given by V = 7r'r2h 3 0 Question Help: Video Submit Question 0 Question 2 v IE 0/1 pt '0 3 8 99 0 Details A spherical snowball is melting in such a way that its radius is decreasing at a rate of 0.2 cm/ min. At what rate is the volume of the snowball decreasing when the radius is 11 cm. (Note the answer is a positive number). 0mg min 4 3 Hint: The volume of a sphere of radius r is V = 31W Question Help: Video Submit Question Question 1 > 0/1 pt 9 3 99 0 Details dr Let A be the area of a circle with radius r. If = 5, find dt dA when r = 2. dt Question Help: DVideo Submit Question0 Question 3 v E 0/1 pt '0 3 8 99 6) Details The altitude of a triangle is increasing at a rate of 1 centimeters! minute while the area of the triangle is increasing at a rate of 2.5 square centimeters/ minute. At what rate is the base of the triangle changing when the altitude is 11.5 centimeters and the area is 95 square centimeters? Question Help: Video Submit