Factor the following expression and include a second degree expression as a factor. 16x3 + 54y6

Can any one me with the answers to these questions asap?

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?