Zack fills two bird feeders with birdseed. Each bird feeder holds cups of birdseed. Zack’s scoop holds 2 1/2 cups of birdseed. Zack's scoop holds 1/4 cup. Write an expression for the number of scoops Zack needs to fill both bird feeders.

20 cups

Explanation:

If Zack fills two bird feeders, and each holds 2 1/2 cups of seed, that means that combined they will hold 5 cups of bird seed. I cup can be divided into fourths (or 1/4), this means that for every cup of bird seed Zack will need four scoops.

Here is an equation to show the

5 cups × 4 (the number of scoops in a cup) = 20 scoops needed to fill both both bird feeders.

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