help with solving and understanding math question about an estimate

Mathematics
Tutor: None Selected Time limit: 1 Day

Ross and Lydia estimate the quotient for 387.5 divided by 73. Ross uses a whole number greater than the dividend. Which equation shows how Lydia uses compatible numbers to get a closer estimate?

A. 400 divided by 80=5

B. 450 divided by 75=6

C 360 divided by 60=6

D 375 divided by 75=5

Nov 12th, 2015

Thank you for the opportunity to help you with your question!

387.5/73=5.31.

So the the following equation shows compatible numbers

B. 450 divided by 75=6

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 12th, 2015

thank you for your reply...can you explain why the answer is b?

Nov 12th, 2015

Because as the dividend being assumed is greater than 387.5 as he is assuming a integer value greater than this. So the quotient will also be greater than 5.3. So there is only possibility B) Where 450> 387.5 and 6> 5.3

Nov 12th, 2015

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Nov 12th, 2015
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Nov 12th, 2015
Dec 5th, 2016
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