An airplane 30,000 feet above the ground begins descending at a rate of 2000 feet per minute. Assume that plane continues at the same rate of descent. A) Find the altitude after 5 minutes.
B) Find the altitude after 8 minutes.
C) Find the altitude after 12 minutes.
D) Determine how long it will take for the plane to hit the ground and crash.

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.

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.