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題目

解題步驟

1. Understand the question

   rainfall in the united states
   24% returned unused to sea
   69% returned to air by evaporation
   7 % used by people
   according to the chart above, how much more water returns to the sea unused than is used by people? check the correct answer.
   a. about twice as much
   b. about three times as much
   c. about 10 times as much

2. Explanation

   Step1: Identify the percentages

   The percentage of water returned to the sea unused is 24%, and the percentage used by people is 7%.

   Step2: Calculate the ratio

   To find how many times more water returns to the sea unused than is used by people, we divide the percentage of water returned to the sea unused by the percentage used by people: $\frac{24\%}{7\%} \approx 3.43$. This is approximately three times.

3. Final answer

   B. About three times as much

答案

Question Analysis

OCR Text

rainfall in the united states
24% returned unused to sea
69% returned to air by evaporation
7 % used by people
according to the chart above, how much more water returns to the sea unused than is used by people? check the correct answer.
a. about twice as much
b. about three times as much
c. about 10 times as much

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