Let r be the region in the first quadrant bounded by the graph of y=sqrt{x-2} and the line y=2.
(a). find the volume of the solid generated when r is revolved about the x-axis.
(b). find the volume of the solid generated when r is revolved about the line y=-2.

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.

At school 460 of the students walk to school the number of students who take public transit is 20% of the number of students who walk. how many students take public transit

If sina is 4/5 then find the value of sin3a . with explanation.