Una paid $2.14 for a notebook. She gave the cashier a $5 bill.
How much change did she receive?

—the graph shows how fast a strand of human hair grows. how many inches would the hair have grown in 5 months

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

Change negative exponents to positive, then solve