Dr. Hall files 320 insurance claims every month. 5% if those claims are rejected, how many claims are rejected? how many are accepted?

The equation for the pH of a substance is pH = - log[H+], where H + is the concentration of hydrogen ions. What is the approximate pH of a solution if the concentration of hydrogen ions is 5.0 * 10-4 moles per liter?

There were 546 people in line to ride The Goliath roller coaster when the line was closed. If the roller coaster has 15 rows that can hold 4 people each, what is the minimum (least) amount of times that it must run in order for everyone to ride?

Simplfy - (5-y) Can some one simplfy this?

Simplify v7 times v7

A code has 6 digits. You can type in 0~9 for your code. How many different combinations of codes can you make if you can repeat digits? How many different combinations of codes can you make if you can not repeat digits?

You buy a board that measures 120 inches long. How many eight-inch sections can you cut from this board?

What is the ratio of the change in y-values to the change in x-values?

Explain the error below The expression x2 - 6x + 8 is a trinomial where a = 1, so it can be factored as x2 - 6x + 8 = (x + 4) (x + 2).?

At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 22 minutes and a standard deviation of 4 minutes.

If 3/8 of figure is shaded, what is 23 of 38?