5. If the area of the circle is 81īt units?, what is the circumference of the circle

Step-by-step explanation:

Given that,

Area of a circle is 8π unit².

Perimeter of circle?

Now

To get the perimeter of the circle, we need to find the radius of the circle from the area given

Area of a circle is given by

A=πr²

Where A =8π

8π=πr²

Then, divide both side by π

8π/π=πr²/π

8=r²

Take square of both sides

√8=√r²

r=2√2 unit

Now we can find the perimeter of the circle

The perimeter of the circle is given as

P=2πr

P=2•π•2√2

P=17.77units

The perimeter of the circle is 17.77units

  q

step-by-step explanation:

each line from a vertex to the midpoint of the opposite side is called a median. the point where the medians intersect, point q, is the centroid.

the centroid of δabc is point q.

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.