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Thursday, September 21 2017 @ 05:59 PM CDT
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By: fanny6573 (offline)  Saturday, April 21 2012 @ 05:55 AM CDT (Read 1309 times)  
fanny6573

Hi pls help!

An alien grows to a weight of 120kg in 75 days by doubling its mass every day. How many days does it take to grow to a mass of 1 kg 875g?

Thanks.

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By: MathIzzzFun (offline)  Sunday, April 22 2012 @ 04:58 PM CDT  
MathIzzzFun

Quote by: fanny6573

Hi pls help!

An alien grows to a weight of 120kg in 75 days by doubling its mass every day. How many days does it take to grow to a mass of 1 kg 875g?

Thanks.



Hi

1 kg 875g --> 15/8 kg
120 kg --> 15 x 8 kg
120 kg / 1kg875g = 8 x 8 = 2 x 2 x 2 x 2 x 2 x 2
75 - 6 = 69
So, the alien will grow to a mass in 69 days

cheers.

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By: fanny6573 (offline)  Monday, April 23 2012 @ 04:12 AM CDT  
fanny6573

Thanks for the solution.

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