When the average price of an item increases from p, to p, over a period of n years, the annual rate of inflation r (in decimal form) is given by r= P21/n - 1. The average price of a loaf of bread increased from $1.00 in 1980 to $3.20 in 2013. What
is the annual rate of inflation r ? Write your answer in decimal form to the nearest hundredth.

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?