Estimate the area under the curve f(x) = x2 from x = 1 to x = 5 by using four inscribed (under the curve) rectangles. Answer to the nearest integer.

Answer 1

1 to 5 is 4 units, so each rectangle is one unit wide

the height of each rectangle is x^2
... x equals one to four ... under the curve

find the combined area

Answer 2

Shouldn't it specify of you are going from the left or the right?

Answer 3

The answers 30, dont ask how I got it

Answer 4

30 is the correct answer.