An urn contains 15 numbered balls, of which 9 are red and 6 are white. A sample of 5 balls is to be selected. How many samples contain at least 4 red balls?

Answer this question only if you know the 30 points and

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

What are the solutions to the equation 4x2+3x=24-x