Evaluate: \(\frac{0.42 \div 2.5}{0.5 \times 2.05}\), leaving the answer in the standard form.
A
1.639 x 10\(^2\)
B
1.639 x 10\(^1\)
C
1.639 x 10\(^{-1}\)
D
1.639 x 10\(^{-2}\)
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
\(\frac{0.42 \div 2.5}{0.5 \times 2.05} = \frac{0.168}{1.025}\)
= 1.639 x 10\(^{-1}\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #57686)