River c is 400 miles longer than river d. if the sum of their lengths is 5 comma 520 miles, what is the length of each river?

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.

You spin the spinner shown below once. each sector shown has an equal area. what is p(beaver ) p(beaver)? if necessary, round your answer to 2 2 decimal places.

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.