Answer:
24
Step-by-step explanation:

Add 9+15 (Use 15+9 if necessary.)
If you got this result:

You are right.

Add

and this is the end result:

So, 15 + 9 is 24.
Answer:
3rd power
Step-by-step explanation:
When the radius of the sphere was doubled it doubled 8 times . it raised so much because of the third power.
Glad I could help (Maybe)
Answer:
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Step-by-step explanation: