The average of \(3^{20}, 3^{30}, 3^{40}\) will be?
Explanation
\(\left(3^{20}+3^{30}+3^{40}\right) / 3=\frac{3^{20}}{3}+\frac{3^{30}}{3}+\frac{3^{40}}{3}=3^{19}+3^{29}+3^{39}\)
Factor the expression \(x^{6}-81 x^{2}\)completely.
A plane flies the 700 miles from Atlanta to Detroit in \(1\frac{1}{4}\) hours. What is the plane's average air speed, in miles per hour?
Chad wants to find the floor area of the triangle shed in his backyard. What formula should he use to find the area?
If \(90 \%\)of X is \(30 \%\) of Y, then Y is what percent of X?
Joseph’s pay increased from \( \$ x\) to \(\$2500\). By what percent did his pay increase in terms of x?