Which expression has the same value as -y^-4-y^4-1/y^41/y^4y^4

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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.

Is there an x intercept in the equation 60*1.15^x