Please Help ASAP - 10 Points!

What is the value of f(g) at f(21)?

What aspects of lines have to be diffrent

On a piece of paper graph f(x)=5•(0.4)^x

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