Question

Can anyone explain this problem to me? http://gyazo.com/ef643ee0f57c122e85e5095b92aee33f.png

Answer 1

he is 69 inches tall. thats given.
put that in the formula and find w for I = 21 and I = 32 ?

Answer 2

\(\large I = \frac{700W}{H^2}\)

\(\large I = \frac{700W}{69^2}\)

put \(I = 21\), and solve \(W\)

Answer 3

Oooh, That makes sense. I was confused about the W. But thank you.

Answer 4

np :)

Answer 5

How do I get W by itself?

Answer 6

@ganeshie8

Answer 7

lets work it for \(I = 21\)

\(\large 21 = \frac{700W}{69^2}\)

Answer 8

you wanto isolate \(W\),
so wat shud be ur first step ?

Answer 9

Hmm, solving the \[69^{2}\] and getting rid of it?

Answer 10

yes, get rid of it
multiply \(69^2\) both sides

Answer 11

\(\large 69^2 \times 21 = 69^2 \times \frac{700W}{69^2}\)

Answer 12

\(\large 69^2 \times 21 = 700W\)

Answer 13

\(W\) is almost isolated !

Answer 14

wat shud be our next step, in isolating \(W\) completely ?

Answer 15

Dividing both sides by 700

Answer 16

divide both sides by \(700\)

\(\large \frac{69^2 \times 21}{700} = \frac{700W}{700}\)

\(\large \frac{69^2 \times 21}{700} = W\)

Answer 17

give it to ur calculator :)

Answer 18

142.83 ?

Answer 19

\(\large \color{red}{\checkmark}\)

Answer 20

next, find \(W\) when \(I=32 \) also

Answer 21

simply replace 21 wid 32 above

Answer 22

\(\large \frac{69^2 \times 32}{700} = W\)

Answer 23

plug it in ur calculaotor

Answer 24

I did and I got 217.6457
What can I round that to?

Answer 25

correct again !

Answer 26

round it to 217.65

Answer 27

Okay :)

Answer 28

oops ! no wait, it says round it to nearest whole number !!!

Answer 29

218

Answer 30

217.6457 rounded to whole number is 218

Answer 31

?

Answer 32

142.83 rounded to whole number is 143

Answer 33

Right :) and the other one would be 143

Answer 34

Yes :)

Answer 35

Lol thanks for helping me

Answer 36

yu wlcme (: