9 ;) thanks that I can help next time I will do better
Answer:
A=B
Step-by-step explanation:
If AUB=A∩B then both A and B contain the values both have hence they're equal
We need to know the "unit of measure" ( ie metre, gram etc) and
the number of units.
ie 10 (No of Units) Metre (Unit of measure)
'a' i think sorry if wrong

So it would be 9 x 3.14 x 10 OR <span>282.6</span>