Flour is sold in 5kg and 2kg packets. The 5kg packets cost $2.75 each and the 2kg packets cost $1.25 each. If I bought 67 kg flour and the total cost was $38.50, how many of each size did I buy?

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?

Can anyone me with 32,33,36,37,and 40.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?