Lucia bought 800 share of a company's stock for $7.94/share. she pays a broker a commission of $16 to buy and sell stock. after one year, she sold all her shares, which were worth $8.75/share at that time. what was her rate of return?

a. 8.8%
b. 9.3%
c.9.7%
d.10.2%

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

the answer is 21%.