An illuminated billboard changes the advertisement it displays every 30 seconds. The advertisement it displays at any time is randomly selected by a computer from a pool of available advertisements paid for by companies wishing to advertise. After an advertisement is displayed, it is immediately put back into the pool.

If 10 companies have each submitted one advertisement, what is the probability that a certain company’s advertisement will be displayed exactly once during any one-minute span?

Students buying lunch at rockwell elementary school yesterday chose either burritos or pizza. 185 students chose burritos and 252 chose pizza. 1. estimate the number of students who brought lunch by rounding each number to the nearest hundred. 2. estimate how many students bought lunch by rounding each number to the nearest ten. 3. find the total number of students who brought lunch. which of your estimates is closer to the actual total? explain. 4. draw a figure on a sheet of paper. estimate how many pennies will fit inside the figure. check your prediction using pennies.

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

How many square centimeters of wrapping paper will be used to wrap the shoe box?