50points plato

the number of teams who entered in a 3-on-3 charity basketbal ournament can be modeled by function t, where x is the number of years since the tournament first started. t(x)=4x+24
the entry fee paid by each team to enter the tounament can be modeled by tunction f, where x is the number of years since the tounament fist started.
f(x)=5x+45
which function, r, best represents the total entry lees collected in the year since the tournament first started?

a. r(x)=20x^2+300x+1080
b. r(x)=20x^2+1080
c. r(x)=9x+69
d. r(x)=9x^2+29x+69