Question

Why is pi(2r)^2(2h) the same as (8)pi(r)^2(h)? It just doesn't make sense to me.. :/

Answer 1

\[(2r)^2=2r\times 2r=4r^2\]
\[4r^2\times 2h=8r^2h\]

Answer 2

But I thought you couldn't multiply different variables?

Answer 3

you can, you just cant add their degrees together

Answer 4

Ohhh, thank you

Answer 5

you can multiply anything you like

Answer 6

when you multiply numbers together you actually do a multiplication,
like \(4\times 2=8\)
when you multiply variables together, you just write then next to each other
like \(r^2\times h=r^2h\)

Answer 7

So you can always multiply coefficients as long as you then at the end write the variables next to each other?