How do i get the area for a oval

The price of a particular stock is represented by the linear equation , where x represents the number of weeks the stock has been owned and y represents the price of the stock, in dollars. if this relationship continues, what is the price of the stock after it has been owned for 12 weeks? $92.55 $94.37 $100.52 $114.39

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!