Which of the following ratios is equivalent to 12/20 3/10 5: 3 120 to 200 60/80

Can you me find the missing length. i attached an image.

Which is f(5) for the function –2x2 + 2x - 3?

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.