30 former classmates gathered to celebrate the anniversary of their school graduation. each of them greeted and shook hands with every other without any exceptions how many handshakes were exchanged when everyone was finished?
note: when person a shakes with person b, person b is also shaking with person a. it is counted as one handshake.

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere

300pi

step-by-step explanation: