The thinnest commercial glass is 0.000984 inches thick. the glass on an aquarium is 1000 times as thick. how thick is the glass?

0.984 inches.

Step-by-step explanation:

The thinnest commercial glass is of 0.000984 inches thick.

Ans the glass on an aquarium is 1000 times as thick as the commercial glass.

Therefore, the glass on an aquarium will have a thickness of (0.000984 × 1000) = 0.984 inches.

Note: If it is 2 times then 2 will be multiplied, if it is 3 times then 3 will be multiplied. So, 1000 times means 1000 will be multiplied.

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15