Jamaican sprinter usain bolt ran the 200 meters in 19.3 seconds at the summer olympics in beijing. what was his speed in meters per second

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

For each proportion find the unknown number x 1/5/8=×/15

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers