What number is to be subtracted from 0.006898 to make it a perfect square ?
A. 0.000008
B. 0.000007
C. 0.000009
D. 0.000006
Answer : C. 0.000009
Explanation:
Subtract 0.000009 from 0.006898
= 0.006898 – 0.000009
= 0.006889
Square root of 0.006889 = 0.083
= 0.083 is a perfect square