What is the sum of the first four composite numbers?

a)19
b)20
c)27
d)28

Name the most appropriate metric unit for each measurement like a length of an carrot

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup