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17 January, 21:09

Ms. Smith has graded 30% of her 90 students science mineral rock projects. How many mineral rock projects does she have left to grade?

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  1. 17 January, 21:30
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    Step-by-step explanation:

    Find 10% of 90 which is 9 then multiply by 3 to get 30%. You get 27 them you ssubtract that from 90
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