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○小小●

2007-09-24 3:23 am

Suppose Mr Cheung's heart beats 72 times per minute and his life-span is 90 years. How many times will his heart beat in his whole life?

請列明步驟～ｔｈｘ～！

更新1:

要用指數～ｐｌｚ～

更新2:

要用指數～例如：7.4x10^6

回答 (3)

Hin Long

2007-09-24 3:31 am

✔ 最佳答案

Suppose Mr Cheung's heart beats 72 times per minute and his life-span is 90 years. How many times will his heart beat in his whole life?
72 x 60 x 24 x 365 x 90
=4320 x 8760 x 90
=3405888000

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[匿名]

2007-09-24 4:03 am

=72x60x24x365x90
=3405888000
=3.41x10^9(3 sig. fig.)

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用戶180931

2007-09-24 3:26 am

72x60x24x365x90
=3405888000

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