The answer would be D h(x)=2(5(1.2)^x+6) because g(x)=10(1.2)x is exponential while f(x)=12x is linear and you can´t combine the two which crosses out C and the f(x)=12x is a positive slope not a negative slope so that crosses out A and as for B it is changing the entire equation by switching the 5 and the 6 because now it is saying that it is g(x)=12(1.2)^x and f(x)=10x which is not what the original equations had so it would have to be D because it has 5(1.2)^x+6x in parenthesis and is being multiplied by 2 so you can think of it as just h(x)=10(1.2)^x+12x which is correct because according to PEMDAS you will solve for the answer for both first then add them after you have the answer so the correct answer is D
You can start by drawing a number line and labeling it with eighths. ( 1/8, 2/8, etc.) Then you can place a dot on 3/8 and 5/8. From there, it's clear to see that 5/8 is greater than 3/8.