How do I do these I need help

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

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Which strategy is used by public health to reduce the incidence of food poisoning?