Katrina developed an app that she sells for $5 per download. she has free space on a website that will let her sell
500 downloads. according to some research she did, for each $1 increase in download price, 10 fewer apps are sold.
determine the price that will maximize her profit.

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