A student calculated using her calculator. Which could be the calculator display?

Select ALL that apply.

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

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.