Can someone PLEASE help me solve this equation ? due soon

We know that : (a - b)(a + b) = a² - b²

We know that : 1 - sin²x = cos²x

We know that : sec²x = 1 + tan²x

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