Find the volume of the described solid of revolution or state that it does not exist. the region bounded by f(x)equalsleft parenthesis x plus 1 right parenthesis superscript negative 19 and the x-axis on the interval [0,infinity) is revolved about the y-axis.

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Yvaries inversely as x. y =12 when x=5. find y when x=4