Final answer:
To fill one bird feeder that holds 2 and a half cups of birdseed, using a 1/4 cup measure, Zach will need 10 scoops.
Step-by-step explanation:
Zach is filling two bird feeders with birdseed, and each bird feeder holds 2 and a half cups of birdseed. With a cup that holds 1/4 cup of birdseed, we need to calculate how many scoops he will use to fill one bird feeder. Since each bird feeder holds 2.5 cups, we can use division to find the number of scoops needed: 2.5 cups divided by 0.25 cups (which is the same as 1/4 cup) equals 10 scoops. Therefore, Zach will use 10 scoops to fill one bird feeder.