Read number 5 and help me out plz add an explanation

Is the square root of 4 plus the square root of 16 rational?

Combine the information in the problem and the chart using the average balance method to solve the problem.

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.