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## Homework Statement

by reading values from the given graph of f, use five rectangles to find a lower estimate and an upper estimate for the area under the given graph of from x=0 to x=10. in each case sketch the rectangles that you use.

## The Attempt at a Solution

since their are there are 5 rectangles, the width was 2 for each of them

and when i tried to figure out the lower and upper estimate i did this

L5= 2*O^2+ 2*2^2 ..... 2 * 8^2 =128

and the answer in the back of the book is 40

and for Right end= 2*2^2 ..... 2*10^2= 440

and the answer is 52