In 2018, there is an average of 45.6 people per 3 square kilometers in the united states. how many people live in 1 square kilometer?

15.2 people per square kilometer.

Step-by-step explanation:            

We have been given that in 2018, there is an average of 45.6 people per 3 square kilometers in the United States.

To find the number of people living in 1 square kilometer we will divide 45.6 by 3.

Therefore, 15.2 people will live in 1 square kilometer.

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.