18) You have 90 minutes to complete at least 18 chemistry and math problems. It takes 5 minutes to complete a chemistry problem
2 answers:
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9.286
[To change to mixed number, count the number of digits after the decimal point. There are 3 digits, so the denominator will be 1000]
Then we simplify the fraction
(286 ÷ 2)/(1000÷2) = 143/500
Therefore,
[To change to mixed number, count the number of digits after the decimal point. There are 3 digits, so the denominator will be 1000]
Then we simplify the fraction
(286 ÷ 2)/(1000÷2) = 143/500
Therefore,