Yes it is C if you do the math and simplify it that is what you’ll get
Answer:

And solving for the radius we got:

And replacing the data given we got:

And this value converted to meters is 
Step-by-step explanation:
For this case we know the population size
and we also know the population density 
We can assume that the area is a circle. We also know that the formula for the population density is given by:

Where P represent the number of people and A the area. Since we are assuming a circle then the area is given by:

With X the radius of the circle
And then the populationd density become:

And solving for the radius we got:

And replacing the data given we got:

And this value converted to meters is 
Answer:
-22
Step-by-step explanation:
set y equal to zero and solve like a regular singular variable equation
Answer:
x = -5
Step-by-step explanation:
1. Divide both sides by -3
2. Simplify 15/-3 to 5
( 15 divided by -3 is -5)
The average speed = (speed 1 + speed 2)/2
the average speed = (80/10 + 100/20)/2
the average speed = (8 + 5)/2
the average speed = 13/2
the average speed = 6.5 km/minute