Grace earns $7 for each car she washes. She already has $25 saved of her weekly earnings. This week, she wants to save $65 in total. Write and solve an equation to
represent how many cars she must wash to save the amount she wants.

9.28/ 10/ 7 times 9.28 = 65

Step-by-step explanation:

9.28 is the exact amount, but the reasonable answer is 10, to finish the car that she is on.

I don't think that there's a way to "prove" that equals anything, since that quantity is undefined.

Moreover, the hyperfactorials are defined as

So, claiming that wouldn't be true, because is already the case that solves the recursion.