Solve within parenthesis first so .49 +.045 =.535 so then divide by five which is .107
I switched both sides of the equation in the very beginning so it would be easier to solve.
Answer:
<h2>35 cm³</h2>
Step-by-step explanation:
The formula of a volume of a cylinder:

r - radius
H - height
The formula of a volume of a cone:

If the cylinder and the cone have the same base (radius) and the same height, then the volume of the cone is three times smaller than the volume of the cylinder.

Therefore:

Yes it is also a 50% decrease.
Well, sum means adding. So adding it all together, I got 2.83 with the 3 repeating