John is organizing a local event. He expects the approximate attendance for the event to be modeled by the function a(t) = -16t2 + 48t + 64, where t is time in hours. Assuming the event ends when there are no attendees, plot the domain to represent the duration of the event. line plot

the duration of this event is 4 hours

Step-by-step explanation:

This function is a quadratic one

let Δ be the dicriminant :

so there are two values that satisfy -16t²+48t+64 = 0  x and y

x<0 so w won't take it since time is a positive value here

so t = y = 4h

answer:  

123455421

step-by-step explanation: easy