Pls help!! Tell whether the number is written in scientific notation. Explain.

1.8×109

yes; The factor is greater than or equal to 1 and less than 10. The power of 10 has an integer exponent.

yes; The factor is less than or equal to 1 and less than 10. The power of 10 has an integer exponent.

no; The factor is less than 1.

no; The factor is greater than 10.

ou would have 12 of each

29933333.33

step-by-step explanation:

idk wbu

step-by-step explanation:

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