There was tree cover on 4,500 acres of land, but two years later there was only 1,125 acres of tree cover. Assume that the coverage decreases at an exponential rate. Write a function to model this situation with a B-value of 1.

What is the value of x in the diagram below?

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Asphere has a diameter of 10 in. what is the volume of the sphere?