Find the area of a circle with a circumference of 12.56 units​

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

Determine the volume of a cylinder bucket if the diameter is 8.5 in. and the height is 11.5 in.

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)