HI,THE ANSWER TO YOUR PROBLEM IS 1:3
HOPE THIS HELPED! D:
Answer:
600
Step-by-step explanation:

x max = 
a = -5
b = 6
-6/2(-5) = 6/10 = 3/5 = .6
.6 thousand = 600
600 speakers should be sold.
Alternatively, you can check the vertex of the parabola formed.
Answer:
-0.003 %Fahrenheit
Step-by-step explanation:
Use a calculator called symbolab.com