You have two people answer and whoever answer you think is better you can mark them as brainliest
Answer: you can use desmos and type it in just like that a graph will pop up. Go to google and type in desmos
Step-by-step explanation:
Answer: 
<u>Step-by-step explanation:</u>






V=(pi)(2r^2)(h)
V=4(pi)(r^2)(h)
V=4(100 aka the old volume)
V=400cm^3