Question

PLEASE HELP! :(

Suppose that c varies directly with n, and n=8 when c=13. Find n when c=4.

Answer 1

as c and n directly vary it can be said that

`(8)/(13) = (n)/(4)`

now we just solve for n

`(8)/(13)=(n)/(c) \\13n=32\\n=2.46`