Since raindrops grow as they fall, their surface area increases and therefore the resistance to their falling increases. a raindrop has an initial downward velocity of 10 m/s and its downward acceleration is a = 3 − 0.3t if 0 ≤ t ≤ 10 0 if t > 10. if the raindrop is initially 500 m above the ground, how long does it take to fall? (round your answer to two decimal places.)

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0