E average cost of gas where you live is $3.50 per gallon, you are trying to decide whether to buy a hybrid or standard car. The hybrid gives you 45 miles per gallon, and the standard gives you 25 mpg, the hybrid car costs $8,960 more than the standard. What are the minimum miles you would need to drive in order for your savings on fuel to surpass the additional cost of the hybrid vehicle?

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