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14 April, 18:08

Which answer is the most reasonable estimation? Greg is running an ultra-marathon that is 100 km long. He runs 32 km before stopping to tie his right sneaker. Then he runs another 11 km before stopping to tie his left sneaker. About how much farther does Greg have to run? A. about 20 km B. about 40 km C. about 50 km D. about 60 km

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  1. 14 April, 19:20
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    He has already ran 43 km, which means he has to run 57 more kilometers.

    If you round this to the nearest ten, then the answer is D. about 60 km
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