D. Subtract 2 from the number of sides and multiply the difference by 180
That will be;
5/6 x 3/10
15/60
3/12
1/4
Hope i helped
Answer:

Step-by-step explanation:
In order to get the answer to this question you need to turn the scientific notations into standard form then subtract the two standard forms.

Turn the notations into standard form:




Turn into notation form:

Hope this helps.