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jcarver2494
21.02.2021 •
Mathematics
There are 90 total days in winter. If it snowed on 30% of the days, on how many days of winter did it snow?
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Ответ:
27
Step-by-step explanation:
30%=0.3 in decimal form
90×0.3=27
Ответ:
27 days
Step-by-step explanation:
Well, there's two ways we could do this (which I do). One way is easier with a calculator, one is useful when you cannot use a calculator.
EASY CALCULATOR METHOD
30% as a decimal is 0.3, so if you multiply 90 by 0.3, you can easily find 30%. So:
90 x 0.3 = 27 days.
NON CALCULATOR METHOD
To find 10% of something, we divide the original value by 10. Therefore, we just need to find 10% and multiply that value by 3 to get 30%. So:
90/10 = 9 days (10%)
9 x 3 = 27 days (30%)
Either way both give you the same answer of 27 days.
Ответ:
q=amount of quarters
d=amount of dimes
0.10d+0.25q=4.20
2d=q
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