Question

Selena bought three light changing light bulbs the green one turns on in 12 seconds the yellow one turns on in 18 seconds the red one turns in 18 seconds how much second till they all light yp together​

Answer 1

18 Seconds

Explanation:

Now here is Why

The Green turns on in 12 seconds

The Yellow turns on in 18 seconds

Lastly,

The Red turns on in 18 seconds

Because the Question asks How much second till they all light yp together​?

We just have to look at the Highest Number

(This is if they are all turned on at the Same Time)

Answer 2

Answer: 36 Seconds

Explanation:

The yellow and red turn on both at 18 and so does green since 12 * 3 = 36 and.18 * 2 = 36 so they all meet at 36seconds