Write an expression in simplest form for the perimeter of a right triangle with leg lengths of 3a^3 and 4a^3

Sara bought a pair of pants that were on sale for 30 percent off of the original price. if the original price of the pants was $29, what was the sales price of the pants?

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9