Using the quadratic formula 3x2 – 13x + 4 = 0

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

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

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?