Do cars get better gas mileage with clean air filters? gas mileage for 10 cars with dirty air filters and clean air filters was studied. each car was tested with a clean air filter and once with a dirty air filter (with the order of the testing randomized). what type of study is this?

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?