You bought a new car for $22,000. The value of the car decreases by 12.5% per year. a. Write an exponential decay equation.

b. Use your equation and logarithms to estimate when the car will have a value of $8,000. Round the number of years to the nearest tenth.

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?