8 to the 4th power times 2 divided by 8 to the eleventh power

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b