Question

find the required value by setting up the general equation and then evaluating.

find r when n=160 if r varies directly as the square root of n and r=4 when n=250

Answer 1

igo t .25 and then .25(160=40 is this correct?

Answer 2

@zepdrix

Answer 3

t is the letter you're using for your constant of variation?

Answer 4

`r varies directly as the square root of n`\[\Large r\quad=\quad t\;\sqrt{n}\]

Answer 5

Plugging in the information they gave us:\[\Large 4\quad=\quad t\;\sqrt{250}\]To t works out to be uhhhhhhh,\[\Large t\quad=\quad 0.25298\]
Ah good looks like you're on the right track! :)

Answer 6

\[\Large r \quad=\quad .25\;\sqrt{n}\] `find r when n=160`

\[\Large r\quad=\quad .25\;\sqrt{160}\]

Answer 7

Your last step looks a little bit off.
Hmm.

Answer 8

r=3.2

Answer 9

Yay good job \c:/

Answer 10

lol thank you