I think it's C i'm sorry if i'm wrong.
Lack of economic development!!! i hope that helps you
I can't tell you the answer because there is no image but to find a perpendicular lines slope you just take the slope and make it opposite.
Ex: Slope is 1/2 what is the perpendicular?
Ans: -2/1
Explanation:
One cycle of the moon phases last for almost around 29 and a half days or 29.5 days .
There are four phases of the moon .
The average number of days between 4 intermediate phases of moon is approximately 7.4 days , however between full , waning/waxing gibbous , waning / waxing crescent,and new moon is around 3.5 days .