D. 1/4
Explanation:
a perfect square is written in the form
(1)
In our problem, we have this perfect square:
(2)
with C being unknown. However, by comparing (1) and (2), we know that

So, we find

and therefore, the missing term must be

so the complete square is

Answer:
90
Step-by-step explanation:
10+67
7586+65
576845=8757685
2+88=90
(2.34/ 7.89) times 100 = ˜29.65%
D. The combined expenses In Year 3 and 4 were $300,000 more than the combined of Year 3 and 4