Question

Malloree wants to calculate the cost of keeping her hot tub heated to a constant temperature. Her hot tub is a square 7 feet on a side, and it is 2.75 feet deep. If it costs $0.03 to heat one gallon of water per month, what would it cost her to keep her tub heated for one month? (1 cubic foot = 7.5 gallons)

Answer 1

It’s a square so it means you have to multiply 7*7*2.75 to get 134.75
Multiply that by 7.5 because one cubic foot holds 7.5 gallons
1010.625 *.03 since its 3 cents per gallon
30.318
Round up
$30.32 is the answer

Answer 2

Explanation:

Mallorie's hot tub is a square. The formula for determining the volume of the square hot tub is expressed as

Volume = L × W × H

Where

L and W represents the length of each side of the hot tub.

H represents the depth of the hot tub.

Her hot tub is a square 7 feet on a side, and it is 2.75 feet deep. Therefore,

Volume = 7 × 7 × 2.75 = 134.75ft^3

We would convert 134.75ft^3 to gallons. It becomes

134.75 × 7.5 = 1010.625 gallons

If it costs $0.03 to heat one gallon of water per month,

then the amount it will cost her to keep her tub heated for one month would be

1010.625 × 0.03 = $30.32