The value of the two-digit number \underline{a} \ \underline{b} in base seven equals the value of the two-digit number \underline{b} \ \underline{a} in base nine. What is a+b?
Answer Choices:
A. 7
B. 9
C. 10
D. 11
E. 14
The value of the two-digit number \underline{a} \ \underline{b} in base seven equals the value of the two-digit number \underline{b} \ \underline{a} in base nine. What is a+b?
Answer Choices:
A. 7
B. 9
C. 10
D. 11
E. 14