Plsss help mehh plsss

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

What percent of the circle below is shaded?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box