6. What is the product of 1/2 and 5/6

What is the interquartile range (iqr) of the data set represented by this box plot?

Im so bad at fractions they are not my best math thing to work on

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?