Final answer:
To express the given rate as a unit rate, divide the total cost ($9.00) by the number of tapes (4), resulting in a unit rate of $2.25 per tape.
Step-by-step explanation:
To express the rate as a unit rate for 9.00 dollars for 4 tapes, we need to calculate how much one tape costs if four tapes cost 9.00 dollars in total. A unit rate is how much one item (a unit) costs.
We can find the unit rate by dividing the total cost by the number of items. Here, we take the total cost of $9.00 and divide it by the number of tapes, which is 4.
Unit Rate = Total Cost / Number of Tapes = $9.00 / 4 tapes = $2.25 per tape
This means that each tape costs $2.25 when you buy them at the rate of 4 for $9.00. The unit rate is a valuable concept when considering price comparisons or making budget decisions like the one José makes when deciding to buy movies instead of an additional T-shirt.