The volume of a sphere is decreasing at a constant rate of 9988 cubic centimeters per minute. At the instant when the volume of the sphere is 3131 cubic centimeters, what is the rate of change of the surface area of the sphere? The volume of a sphere can be found with the equation
V=4/3πr^3 and the surface area can be found with
S=4πr^2 Round your answer to three decimal places (if necessary).

Dropping less than two inches per mile after emerging from the mountains, a river drains into the ocean. one day's discharge at its mouth, 5.6 trillion gallons, could supply all of country a's households for seven months. based on this statement, determine how much water an average household uses each month. assume that there are 100 million households in country a. country a uses approximately nothing gallons per household per month.

I'll give brainliest if you answer right : )

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.