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Sagot :
Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship. For example, “This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of gallons of water.”How many cups of disinfectant are needed for 20 gallons of water so c is
I use ratio and proportion
changes 3/4= .75
.75 cups/2 gallons= x cups/2o gallons
cross multiply
2x= 15
x= 7 1/2 cups
also there are 10 gallons for every 3/4 cup
10 x 3/4= 30/4= 7 1/2
I like ratio and proportion it's more consistent in solving lots of problems
hope this helps
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