Find the rate of change (Slope) of each graph below (simplify answers)​

Which of the following tables represents exponential functions?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Factor and solve to find roots x squared -x - 90 =0