Question

In 10 minutes a heart can beat 700 times. At this rate, in how many minutes will a heartbeat 140 times? At what rate can a heartbeat?

Answer 1

Set up a proportion.

Beat in 10 minutes : minutes = 140 beats : unknown minutes.

700 : 10 = 140 : x

x = (140*10)/700 = 1400/700 = 2

Answer 2 minutes

Answer 2

Answer:

Heart will beat 140 times in 2 minutes.
Heart beats at a rate of 70 beats per minute.

Step-by-step explanation:

In 0 minutes heart beats 700 times

hence in 1 minute it will beat 70010=70 times

and heart will beat 140 times in 14070=2 minutes