HELP i’ll brainLIST U why are water quality standards important?

a. they help protect clean water and improve the quality of polluted water

b. industries would not self regulate and the standards force them to treat unsafe water

c. The standards guarantee that every home in the nation has safe drinking water

d. there is a limit amount of clean water in the world and like oil once it used up it’s gone

Grade 91.)the gravitational pull from the moon words).2.) what is the rate of gravitational 3.)if you drop a hammer, is it more likely to drop handle side down, head side down, or equal chance that it will land either way? why? 4.)a car moves 60km east and 90km west.a.) what is the distance the car traveled? b.) what is the car's displacement5.)what is the average velocity of a car that moved 60 km south in 3 hours? 6.) a car starts from rest and acceleration to 60 m/s over a time of 5 seconds. what is the acceleration of the car? 7.)what is the speed of an object at rest?

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

Wich is not standing in the way of astronomers getting a good view of different star