Which represents the greatest time frame in which a short-term environmental change can occur? in days
O in minutes
over hundreds of years
O over thousands of years

Can someone check my answer? you : )

Bill works as a waiter and is keeping track of the tips he ears daily. about how much does bill have to earn in tips on sunday if he wants to average $22 a day? tips by day tips (dollars) monday tuesday wednesday thursday friday saturday $14 $22 $28 $36

What is the product? a-3/15a × 5/a-3