What is the 8 worth in the number 203,810

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Which statements about these triangles is true

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?