If m(x) =x^3 and n(x) =5x+9, which expression is equivalent to (man)(x)

Ineed if you could explain and give me the answer you! this needs done

What is the surface area of a cube with the volume of 729 ft?

Josie buys a pair of boots that retail for $52.00 dollars, however they are currently on sale for 25% off how much does josie pay for the boots if there is also a 6% sales tax on them