3 is 4% of what number ?

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

Find the distance between the pair of points a(-1,8) and b(-8,4)

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)