Plz can someone help me with this problem thank you

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

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