Someone help fast please

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

How far could you drive on 50 gallons of gas