Answer:
2400000pi cubic meters of dirt had to be removed to build the Chunnel.
Step-by-step explanation:
Volume of a <em>half-cylinder</em> can be stated as:
where
- r is the radius (here the height)
- h is the height ( here the lenght)
Thus, one half-cylinder tunnel volume is: 
=800000pi
Since there are 3 half-cylinder tunnels, 3×800000pi=2400000pi cubic meters of dirt had to be removed to build the Chunnel
22 because you take the smallest and largest number and subtract them so you do 81-59=22
$21 would be the price of all three necklaces. But you need only 1 necklace so divide by 3, and the answer is $7.
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.
