(7j^2 )^3
need some help !!

sounds & other waves originate from any vibrating object

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75