So, here I am, beginning the calc II and beginning to make new mistakes as well

, I have this problem, which states:

-Evaluate the integral by interpreting it in terms of areas. In other words, draw a picture of the region the integral represents, and find the area using high school geometry

of

.

What I have done is:

-evaluated the function

a)

and

we have

and

- then, by evaluating the integral, I have got:

,

and I must have made a mistake somewhere, because it say that it's wrong, or, maybe I should solve it by another method, but I have no idea how...

thank you, for all your input,

dokrbb