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4*10^2 (400 in scientific notation)

Step-by-step explanation:

2*10^7 / 5*10^4 = 400

400 = 4*10^2 in scientific notation

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

2

step-by-step explanation: