Question

A light bulb consumes
2400
watt-hours per day. How long does it take to consume
12600
watt-hours?
please help me

Answer 1

\(\begin{array}{cclll}
watt-hours&days
\\\hline\\
2400&1\\
12600&x
\end{array}\implies \cfrac{2400}{12600}=\cfrac{1}{x}\)

solve for "x"

Answer 2

2400

Answer 3

2,400 days? that's 6years and a half, or 78 months.. .man, I'd like to get a few of those long-lasting lightbulbs

Answer 4

i dont know :(

Answer 5

just cross-multiply, and solve for "x"

Answer 6

just do it, like you did it in the previous one

Answer 7

5.25

Answer 8

so.. how did you get "x" anyway?

Answer 9

I was 12600 multiply by 1 and then divide it by 2400

Answer 10

yeap \(\bf \cfrac{2400}{12600}=\cfrac{1}{x}\implies x=\cfrac{\cancel{12600}}{\cancel{2400}}\implies x=5.25\)