What is the mean and MAD of 44.4 43.8 45.6 45.9 44.1 45.6 44.0 44.9 45.8 ?

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles