Jordan and miles ran laps after school to train for the baseball team .the ratio of the number of laps Jordan ran to the number of laps Miles ran was 3 to 4 if Jordan ran 9 laps ,how many laps did miles run

Can someone me with this problem . show your work .

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?