A jewelry store has 54 pieces of jewelry for sale, and 21 of them are key chains. What is the probability that a randomly selected piece of jewelry will be a key chain?

What is the length of the unknown leg in the right triangle ?

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?