A scale diagram of a room is drawn using a scale of 1:50 The length of the room on the scale drawing is 20 cm.
a How long is the actual room?
Give your answer in metres.

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

On a architect's drawing of a house, 1 inche representa 1.5

How to use order of operation in 20 divide by 4 multiply 5 = 1