A beauty supply store expects to sell 100 flat irons during the next year. It costs $1.20 to store one flat iron for one year. There is a fixed cost of $15 for each order. Find the lot size and the number of orders per year that will minimize inventory costs.

Use set builder notation to represent the following set: { -3, -2, -1, 0}

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?

You love to play soccer! you make a shot at the net 8 times during a game! of those 8 attempts, you score twice. what percent of the time did you score?