Kelly bought a used car for $20,000 and the dealer told her that it will lose 9% of its value each year after its purchase.

if values continue at that rate, calculate how long it will take until the car is worth only $7,000.

round your answer to the nearest tenth.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.