The population density D (in people/mi2) in a large city is related to the distance x (in 5000x
miles) from the center of the city by D =
x2+36
a) What eventually happens to the density?
b) In what areas of the city does the population density exceed 400 people/mi??

there would be 365 different 4 digit numbers

step-by-step explanation:

i belive that it is 365 because i asked google

1. x> -5

2. x< 8

step-by-step explanation:

1. 2x> -10

divide by 2 from both sides of equation.

2x/2> -10/2

simplify, to find the answer.

-10/2=-5

x> -5 is the correct answer.

2. 3x< 24

divide by 3 from both sides of equation.

3x/3< 24/3

simplify, to find the answer.

24/3=8

x< 8 is the correct answer.

i hope this you, and have a wonderful day!

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5