A scientist needs 75ml of 30% concentrate solution for a certain experiment, but he only has 25% solution and 45% solution. How many milliliters of 25% and 45% solutions should he mix to get what he needs?

What kind of bond pays interest which is exempt from tax?

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

According to the data set, where should the upper quartile line of the box plot be placed?