27 list the factor is this prime or composite

Which is an equation for the nth terms of the sequence 12,15,18,21

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.71 with a standard deviation of $0.10. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.41 and $4.01? round your answer to one decimal place.