7 plus 7 equals 14. Add one to that and you have 15 which is the answer.
The number:

is going to be between the numbers 563 and 564; since 10 squared equals 100 and the decimal point will move to places to the right.
Therefore, the answer is D.
Answer:
4
Step-by-step explanation:
3 in by 4 in
because one half of 6 is three and one half of 8 is 4