What is the mean of 17, 12, 28, 21, 14, 74, 32, 14, 25, 23

An animal shelter has 21 puppies. if the puppies are 28% of the total dog and cat population , how many dogs and cats are in the animal shelter

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15

What is the number 321,000,000 in scientific notation? also what is the number? ?