The monthly membership fee for an online television and movie service is $9.80.
The cost of viewing television shows online
is included in the membership fee, but
there is an additional fee of $1.50
to rent each movie online. For one
month Jill's membership and movie
rental fees were $12.80. How many
movies did Jill rent online that month?

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