A meteor falls toward Earth's surface. Given that the acceleration due to gravity is 9.8 m/s2, what is the meteor's potential energy if it has a mass of 20
kg at an altitude of 500 m?

I’m stuck on this i don’t understand.

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.