9/80 is equal to the decimal .1125
For 15 the answer is 8
for 16 the answer is 9
for 17 the answer is 1
A rectangle, presumably, as the cross section is going to be whatever shape the outward faces are (in the case of a vertical cross section like this one)
The answer is Rotation.
Good luck!
It's the first one because all the y's are the same number. That means that when you graph the chart you would get a horizontal line. Horizontal lines on graphs always have a slope of zero....unlike a verticals slope is undefined.
