What two integers does the square of 18 fall between

Answer this question, only if you know the answer. 30 points and brainliest!

Standard deviation of 19,29,21,22,23

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.