Question

Proportion: a projector is shining an image on a screen 'd' metres away.
the brightness of the image 'B' varies inversly as the square of the distance.
when d=5 and B=40 calculate B when d=3.7
pretty easy question but would it be B=k/sqrtD or B=k/D^2 ? Thanks

Answer 1

so is the equation: \[B=\frac{ k }{ d^{2} }\] or \[B=\frac{ k }{ \sqrt{d} }\]

Answer 2

It's the first equation.

Answer 3

i think the second one is correct

Answer 4

haha whose right?

Answer 5

sorry rav is right

Answer 6

okay thanks

Answer 7

b is as square

Answer 8

it's not math it's grammar , square refers to b