8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

8,000,802,4800

Step-by-step explanation:

Katrillion isn't a real value but everything else is.

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step-by-step explanation:

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80