Question 377700
substitute and solve for x ___ 400 < 5000x /(x^2+36)


400x^2 + 14400 < 5000x


2x^2 - 25x + 72 < 0


factoring ___ (2x - 9)(x - 8) < 0


if x < 4.5 , both factors are < 0 , so the product is >0
if x > 8 , both factors are >0 , so the product is >0


4.5 < x < 8



if you think about real life , businesses would be concentrated in the city center
with people living farther out , but becoming less populated into the suburbs