Answer:
6n-1
Step-by-step explanation:
Re-arrange
-(1 - 6n)
-(-6n + 1)
Distrubute
-(-6n -1)
6n - 1
In exponential form, it would be xy^2z^3
Answer:

Step-by-step explanation:
Split the diametre in half before proceeding:

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10, 000, 000 = ten million
40, 000 ,000 is the answer for the nearest ten million