Find the volume of the figure

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

The area of a circle is equal to 1 dm². find the radius of the circle.

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.