If a book was originally $20 and is now on sale for $16, what percentage is the book discounted?

answer

%20 or 0.20

Step-by-step explanation:

Multipy 20 by 0.20 and get 4 then subtract 4 to 20

0.20

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