Pls help me it’s due in a few min

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Which problem would you use the following proportion to solve for? 24/x=40/100 a. what is 40% of 24? b. what percent is 24 of 40? c. twenty-four is 40% of what number? d. forty percent of 24 is what number?

Through which points should a line of rotation be placed to create a cylinder with a radius of 3 units