Please explain me how i am gonna slove this

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)