A rectangular table that is placed lengthwise against a wall is 8 feet long and 4 feet wide. Balloons will be attached 8 inches apart along the three exposed sides, with one balloon at each of the four corners. How many balloons are needed?

What is the pattern in the values as the exponents increase?

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?