What are the more appropriate measures of center and spread for this data set

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.