I have 6 questions. 4% of what number is 28?
0.8% of what number is 4?
200% of what number is 108?
30% of 290 is what number?
14.2 is 35.5% of what number?
18 is what percent of 30?

Please write them out in a proportion form. I need these before 3:10 for a test! Ty

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

F(x)=5/6x+3 which of the following is true

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14