What is 0.25 as a percent?

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?