What is the formula for finding the area of a circle?

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Which of the following is true for the relation f(x)=2x^2+1

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?