Answer: 2,500 people per square mile
Step-by-step explanation:
Population density is calculated by : Population / square miles
Therefore :
Population density = 400,000/160
= 2,500
Let, coordinate of point A' is (x,y).
Since, A' is the symmetric point A(3, 2) with respect to the line 2x + y - 12 = 0.
So, slope of line containing A and A' will be perpendicular to the line 2x + y - 12 = 0 and also their center lies in the line too.
Now, their center is given by :

Also, product of slope will be -1 .( Since, they are parallel )

x = 2y - 1
So, 
Also, C satisfy given line :

Also,

Therefore, the symmetric points is
.
Answer:
4
Step-by-step explanation:
1,4,5,2,3. Division is basically subtraction when it comes to exponents so x to the point of one minus -3 becomes 4, etc.
Answer:
15 days
Step-by-step explanation:
Total hours required =
16×5×6 = 480
Let n be the no. of days
480 = n×8×4
480 = 32n
n = 480/32
n = 15