High School

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Use dimensional analysis to convert the given unit to the unit indicated. Where necessary, round answer to two decimal places. 70,000ft³ to gal
a. 1617 gal
b. 523,600 gal
c. 5,236,000 gal
d. 1400 gal

Answer :

Final answer:

the correct answer is b. To convert 70,000 cubic feet to gallons using dimensional analysis, multiply 70,000 ft³ by the conversion factor of 7.48 gallons per cubic foot, resulting in 523,600 gallons.

Explanation:

The student is asking how to convert 70,000 cubic feet (ft³) into gallons using dimensional analysis. To do this correctly, we need the conversion factor between cubic feet and gallons. In this instance, we know that 1 cubic foot equals approximately 7.48 gallons.

To convert 70,000 ft³ into gallons, we would set up our dimensional analysis as follows:

  1. Write down the quantity you want to convert (in this case, 70,000 ft³).
  2. Write the conversion factor as a fraction that will cancel out the unwanted unit (ft³) and introduce the desired unit (gallons).
  3. Multiply the quantity by this conversion factor.

Executing these steps:

70,000 ft³ × (7.48 gallons / 1 ft³) = 523,600 gallons

Therefore, the correct answer is (b) 523,600 gallons.

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