A and b are positive integers and a−b = 2. Evaluate the following:
2^a / 2^b

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

What is x and y intercepts for y=x+7

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)