BuyFind

Precalculus: Mathematics for Calcu...

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

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

Answer to Problem 32RE

  3.786912×109

Explanation of Solution

Given information:

If your heart beats 80 times per minute and you live to be 90 years old, estimate the number of times your heart beats during your lifetime. State your answer in scienti?c notation.

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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