The diameter of a round coin is 27.9 millimeters. What is the approximate area of one face of the coin?

A.100 mm2
B.200mm2
C.600mm2
D300mm2

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

How do you solving the solution of each system using elimination?