Okay, first, given the equation, we need to find out what the radius of the circle is. Let us state the general equation of a circle:

Where

is the centre of the circle. In this case, we don't need to know the centre. Just the radius.
Let us start by converting the equation into standard for, which I typed above. Divide both sides by 81.

Great! We now know the radius of the circle. It is

because it is the bottom fraction. Now we know that the radius is 9.
So now lets input this into the area of circle formula:
Now we insert our radius.
You can convert that into a decimal if you wish.
Hope this helped!
~Cam943, Moderator
If 500 miles is represented by 7.5 inches:
Divide 500 by 7.5
500/7.5 = 66.666
Multiply this by 3.3
66.666*3.3 = 220
The answer is 220 miles
Answer:
-74x^2
Step-by-step explanation:
-2x x 5x -(8x)^2
-10x^2-(8x)^2
-10x^2-64x^2
-74x^2
Answer:
It should the miners
Step-by-step explanation:
Miners:
17(time) x 16 (feet per second) = 272(distance)
equipment
22 (time) x 6 (feet per second)= 132 (distance)