In order to make profit, businesses must sell (mark up) their product for more than it costs to produce it. If the average production price for a certain product was $8.19, and they sold it for $13.99, by what percent was the product marked up for?

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

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?

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?