Question

1. a heart beats 264 beats in 3 minutes. what is the unit rate?

a 72 beats in 1 minute
b 70 beats in 2 minutes
c 88 beats in 1 minute
d 176 beats in 2 minutes

Explanation:

Step1: Define Unit Rate

Unit rate is beats per 1 minute. So we need to find beats in 1 minute by dividing total beats by total minutes.

Step2: Calculate Beats per Minute

Total beats = 264, total minutes = 3. So unit rate = $\frac{264}{3}$ = 88 beats per minute. Now check options:

• Option A: 72 ≠ 88.
• Option B: 70 in 2 minutes is 35 per minute ≠88.
• Option C: 88 in 1 minute matches.
• Option D: 176 in 2 minutes is 88 per minute, but unit rate is per 1 minute, so C is correct.

Answer:

C. 88 beats in 1 minute