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A.

`\int_(1.25)^6 f(x)dx`

B.

`\int_(-2)^(1.25) f(x)dx`

C.

`\int_(-2)^(3.5) f(x)dx`

D.

`f^(')(3.5)`

E.

`\int_(1.25)^6 f(x)dx+\int_(1.25)^(-2) f(x)dx`

2. Determine an upper estimate for the area under the curve

`f(x)=sinx`

between

`x=(\pi )/(2)`

and

`x=\pi `

. Show how you arrive at this estimate. 3. Determine a lower estimate for the area under the curve

`f(x)=sinx`

between

`x=(\pi )/(2)`

and

`x=\pi `

. Show how you arrive at this estimate. Make one more estimate for the area described in (2) and (3), but improve upon your estimates from those previous items (hint: use more rectangles).