The height ,h, in feet of an object above ground is given by h=-16t^2+64t+160, where t is the time in seconds. How long does it take the object to hit the ground?

Your weight on the moon is relative to your weight on earth. neil armstrong weighed 360 lbs. in his moon gear while on the earth, but on the moon he only weighed 60 lbs. how much would a 150 lb person weigh on the moon?