Plot the points (-1,3), (4,-2), and (1,-5) in a coordinate plane. are the points the vertices of a right triangle?

I’m still confused on how to work the percentages

If the probability of an event happening is 65% then the probability this event does not occur?

Marion has a bicycle that she is planning to take for a ride. the rim of the rear wheel lies 41 cm from the center of the wheel. the tire itself has a thickness of 3 cm. in order for marion to ride her bicycle 96,712 cm approximately how many rotations will the rear wheel make?