Answer:
78.5
Step-by-step explanation:
Formula to find area of a circle: A= pi*raduis to the second power
3.14*
First you square the 5
You do this by multiplying 5 times itself
3.14*25
Then you multilpy 3.14 and 25
78.5
Answer:
4
Step-by-step explanation:
Answer:
The center is at (-3, -2) and the radius = 1.
Step-by-step explanation:
We can do this by converting the given equation to standard form.
x^2+6x+y^2+4y+12=0
x^2+6x+y^2+4y = -12
Completing the square on the x and y terms:
(x + 3)^2 - 9 + (y + 2)^2 - 4 = -12
(x + 3)^2 + ( y + 2)^2 = -12 + 9 + 4
(x + 3)^2 + ( y + 2)^2 = 1
So the center is (-3, -2) and the radius = 1.
Answer:
77
Step-by-step explanation:
mean is also known as the average
to find the average you add up every data point and divide by number of data points.
74 + 75 + 80 + 76 + 75 + 81 + 78 = 539
539 / 7 = 77
