What does the ratio of the circumference to the diameter represent? explain

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

Which statement describes surface features called maria on the moon

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