Can somebody answer it for me please. simplify and it can only contain positive exponent.

Franco wants to double the volume of the cone. what should he do?

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account. write an expression to represent the total amount in his savings account.