An airplane 30,000 feet above the ground begins descending at the rate of 2000 feet per minute. a. Write an equation to represent the airplane's height above the ground in feet as a function of time in minutes.

b. How many minutes will it take for the plane to reach a height of 18,000 feet above the ground?

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?