Answer:
615.44 units squared
Step-by-step explanation:
Let the volume and surface area of the sphere be V and S respectively.

Hi there!
From what I know, when you multiply one number in a ratio, you must also multiply the other number by the same number. This allows for the ratio to stay the same, thus keeping it correct. If both terms were not multiplied by n, the ratio would no longer be the correct ratio.
Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
Answer:
Yes, it is a function
Step-by-step explanation:
anytime you want to test to see if the graph is a function, perform a vertical line test.
Basically if you drew a vertical line and the vertical line crosses the graph at only one point that means the graph is a function.
If it crosses on more than one point the graph is not a function.
Answer:
The probability is 0.05.
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
In a certain study comma the chances of encountering a car crash on the road are stated as "1 in 20."
This means that in 20 times you go out on the road, in 1 of them you are expected to encounter a car crash.
This means that

The probability is 0.05.
Let's simplify step-by-step.
2
z
−
4
−
z
=
2
z
+
−
4
+
−
z
Combine Like Terms:
=
2
z
+
−
4
+
−
z
=
(
2
z
+
−
z
)
+
(
−
4
)
=
z
+
−
4