Short Response: What value of x makes the polygons below have the same perimeter?

Np4=12np2 with clear explanation.

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.

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air