First convert 5,280 ft. into inches.

5280 ft. equals 63360 inches.
Then you divide that by 42

If you're rounding to the nearest step then it would take 1509 steps to run 1 mile.
Since there are no specific requirements given other than expression written using exponents, I am just going to give some examples.
1. 5x^2 - 3
2. 8^5 - 15x + 7
3. 15x^10 - 8x^7 + 16x^5 + 17^3 - 4^2 +13x - 2
Answer:
It comes from correct solution steps and is not a valid solution of the equation.
Step-by-step explanation:
Chloe can buy 7 pencil boxes and have 1 dollar left
Alejandro is correct because you do not need to add another number to 76.518, as Jiro did, but you need to round it to the nearest tenth.
Glad I could help, and good luck!