To determine if Mary has enough money to buy 8 pounds of grapes at $1.89 per pound, we can calculate the total cost of the grapes.
Total cost = Cost per pound × Number of pounds Total cost = $1.89 × 8 = $15.12
Now let's compare the total cost to the amount of money Mary has:
- Total cost of grapes: $15.12
- Amount of money Mary has: $15.00
Since $15.12 is greater than $15.00, Mary does not have enough money to buy the 8 pounds of grapes.