HELP PLEASE

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

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?