Kelsey could have written equation for the given condition as
6 × 10⁴ × 10 ⁻¹ = 6 × 10³
" An equation is defined as the representation of algebraic expression which shows the relation between two quantities with the sign of equality."
Formula used
Volume of the cuboid = Length × width × height
According to the question,
Given,
Thickness of book = 15 feet thick
length of the book = 1 feet long
Width of the book = 12 feet wide
Height of railroad car = 10 feet high
length of the railroad car = 60 feet long
Width of the railroad car = 10 feet wide
Substitute the value in the formula we get,
Volume of a railroad car = 60 × 10 × 10
= 6,000 ft³
⇒ 6 × 10⁴ × 10 ⁻¹ = 6 × 10³
Volume of a book = 1× 12 × 15
= 180 ft³
Number of books fill railroad = (6000 / 180)
= 33.33..
≈ 33 books ( approximately)
Hence, Kelsey could have written equation for the given condition as
6 × 10⁴ × 10 ⁻¹ = 6 × 10³.
Learn more about equation here
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