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ritasolomon85
05.04.2020 •
Mathematics
Ann paid $5.20 in sales tax for an $80 purchase.What percent sales tax did Ann pay on her purchase?
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Ответ:
6.5%
You can use proportion:
80 is 100%
5.20 is x %
80/5.20=100/x
80x=5.20*100
80x=520
x=6.5
So Ann paid 6.5% sales tax on her purchase.
Ответ:
Plugging those into the formula, you get
Multiply .5 and 20:
To get base by itself, divide by 10 on both sides:
The base is 15 cm.