Emerson is cutting boards that are 3/4 foot long to make bird houses. How many pieces can he cut from a board that is 9 feet

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

The triangles are similar. what is the value of x? show your work.