Mathematics
WAEC 1998
Evaluate \(3.0\times 10^1 - 2.8\times 10^{-1}\)leaving the answer in standard form
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A.
\(2\times 10^{-1}\)
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B.
\(2\times 10^{2}\)
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C.
\(2.972 \times 10^{1}\)
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D.
\(2.972 \times 10^{2}\)
Correct Answer: Option C
Explanation
\(3.0\times 10^1 - 2.8\times 10^{-1}\) = 30 - 0.28 = 29.72 = 2.972 x 10\(^1\)
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