Elevation is measured as a distance above or below sea level. sea level has an elevation of 0 feet. johanna is standing on a hillside 35 feet above sea level, and marcus is exploring a cave at an elevation that is the opposite of johanna's elevation. what is marcus's elevation? plz

If u give wrong answer ill report u : )

Classify the polygon by its number of sides. state whether the polygon appears to be regular or not regular. a.heptagon, regular b. heptagon, not regular c. octagon, regular d. octagon, not regular

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below: