HELP PLEASE find the midpoint of each line segment

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints

Deena is planting two rectangular gardens. one garden is 3.67 feet by 8.56 feet, and the other garden is 3.67 feet by 7.45 feet. which expression does not respresent the total area in square feet of the two gardens