It says First, show 3/5 of 1/4 on the model. I don't know how pls help me.​

Volume of a cylinder with a radius of 13 in and height of 30 in

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

What expression is equivalent to 1/2(2+3x-6)