Pls help I don’t understand!

Name these type of angles shown check all that applies

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

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.