Question

A person blinks about 20 times each minute. About how many times will a person

blink in 80 years (4.2 107 minutes)? Write your answer in scientific notation. Show
your reasoning below.

Answer 1

Answer: 840,960,000

Explanation:

20 blinks*60 mins= 1,200/hr

1,200*24 hrs in a day= 28,800 blinks/day

28,800*365 days in a year= 10,512,00 blinks/ year

10,512,000*80 years= 840,960,00

840,960,000= 8.4096* 10^8