Find the volume when the area is within y=x-2, y=4-x^2 is rotated about x=4

Is this a polynomial function? i need to know asap

Louis wants to give \$15 to kids who need school supplies. he also wants to buy a pair of shoes for \$39. how much money will he have to save for both?

Abuilder divides a rectangular plot in half along the diagonal.if the plot is 1\2-mile wde and the diagonal measures 1 3\10-miles long,what is the length of the plot?