help me solve these problems please

0 Question 45 v The area of a healing wound is given by A = 71")\"2. The radius is decreasing at the rate of 2 millimeter per day at the moment when r = 49. How fast is the area decreasing at that moment? Question Help: El Video Submit Question 0 Question 46 v At noon, ship A is 40 nautical miles due west of ship B. Ship A is sailing west at 25 knots and ship B is sailing north at 19 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.) Question Help: [3 Video Submit Question 0 Question 47 v A spherical snowball is melting in such a way that its radius is decreasing at rate of 0.3 cm/min. At what rate is the volume of the snowball decreasing when the radius is 12 cm. (Note the answer is a positive number). 3 m min 4 3 Hint: The volume of a sphere of radius r is V = 57W Submit Question 0 Question 48 v Water is leaking out of an inverted conical tank at a rate of 14700 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 meters and the diameter at the top is 6.5 meters. If the water level is rising at a rate of 16 centimeters per minute when the height of the water is 3.5 meters, find the rate at which water is being pumped into the tank in cubic centimeters per minute. cm3 ll min Question Help: E] Video Submit Question 0 Question 49 v An inverted pyramid is being filled with water at a constant rate of 75 cubic centimeters per second. The pyramid, at the top, has the shape of a square with sides of length 5 cm, and the height is 8 cm. Find the rate at which the water level is rising when the water level is 2 cm. [ I cm/sec Submit