# State the answer in scienti?c notation.

### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

#### Solutions

Chapter 1, Problem 32RE
To determine

## State the answer in scienti?c notation.

Expert Solution

3.786912×109

### Explanation of Solution

Given information:

Calculation:

To estimate the number of times your heart beats during lifetime, first we need to find the number of minute in life time.

We know,

1hour=60minutes1day=24hours=24×60=1440minutes

We know,

1year=365.25days=1440×365.25=525,960minutesin90year90year=525960×90=47,336,400minutes

The heart beats 80 times per minute. So,

=47336400×80=3786912000

The scienctific notation moves 9 places to right side,

=3786912000=3.786912×109

Hence, the number of times heart beats during lifetime is 3.786912×109

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