Fourth grade level. use mental math to find 7x53

Karl needs to build a stage that has an area of 72 square feet.the length of the stage should be longer than the width.what are the possible whole number measurements for the length and with of the stage complete the table with possible measurements of the stage

Which is the graph of the function y=2(4)^x

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?