In a recent survey, 45% of those responding said they feel that they do not use public transportation often enough. If there were 1300 people surveyed, how many of them responded that they feel this way?

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =

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?