A certain intravenous tubing apparatus releases 60 drops of fluid per minute. How many drops will be released in 2 1/2 minutes?

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Multiple Choice

A certain intravenous tubing apparatus releases 60 drops of fluid per minute. How many drops will be released in 2 1/2 minutes?

Explanation:
The amount is found by multiplying the rate by the time. If fluid comes out at 60 drops per minute for 2.5 minutes, you do 60 × 2.5. That equals 150 drops (since 2.5 = 5/2, so 60 × 5/2 = 30 × 5 = 150). You can think of it as 60 drops for each of the first 2 minutes (120 drops), plus an extra half-minute at 60 drops per minute (30 more drops), totaling 150. The other numbers don’t match because they would require either a shorter time (120 for 2 minutes) or a different rate.

The amount is found by multiplying the rate by the time. If fluid comes out at 60 drops per minute for 2.5 minutes, you do 60 × 2.5. That equals 150 drops (since 2.5 = 5/2, so 60 × 5/2 = 30 × 5 = 150). You can think of it as 60 drops for each of the first 2 minutes (120 drops), plus an extra half-minute at 60 drops per minute (30 more drops), totaling 150. The other numbers don’t match because they would require either a shorter time (120 for 2 minutes) or a different rate.

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