Answer:

Step-by-step explanation:
We have to use the law of indices for finding the equivalent expression.
We square 8, which is 64 and multiply the two powers.
We multiply the 2 powers giving us,
, which simplifies to 2.
×
=
This is the answer as we multiply the two indices together.
I hope this helps!! ^-^
Answer:
13⅛mm²
Step-by-step explanation:
Area = ½×base×height
31 minus 7 is 24. 24 divided by 3 is 8. The number is 8.