Answer:
50 beats/min
Step-by-step explanation:
normal heart rate = h
20% of h = 10
20/100 * h = 10
h = 10*5
= 50 beats/min
Hope this help!
21
He will guess correctly 25% of the time.
He has 84 questions
25% of 84
.25 * 84
We should expect that he will get 21 questions correct
