Question: The cost for 10 ounces of organic blueberries is $2.70. Which equation can be used to determine x, the cost, in dollars, for 30 ounces of organic blueberries?
A) 10/2.7=x/30
B) 2.7/10=30/x
C) 10/2.7=30/x
D) 2.7/30=x/10
Correct answer: C
Grade: 7 | Topic: Ratios and proportions | Difficulty: Medium | Standard: 7.RP.A.2c