Answer:

Step-by-step explanation:
The formula of a volume of a sphere:

R - radius
We have R = 3 ?. Substitute

If the radius is 30, then the volume is:

If 30 is the length of diameter, then the radius R = 30 : 2 = 15.
Therefore the volume:

Answer:
75
Step-by-step explanation:
an arc is half a circle
Answer:
$23.18
Step-by-step explanation:
A circle is 1 revolution or 360 degrees. So, the probability that a dart <span>will land in the unshaded region is
</span>

The answer is
67%.
Answer:
(x , y) ----> (-x , y)
Step-by-step explanation:
(x , y) ----> (-x , y)
Example for 1. :
(-4,2) ---> (4,2)