AR - Convertion of expanded to standard form — task. Mathematics CBSE, Class 8 New.

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Assertion:

\((7 \times 10^{1}) + (2 \times 10^{0}) + (4 \times 10^{-1}) + (5 \times 10^{-2})\) \(=\) \(72.45\)

Reason:

\(\frac{1}{n^{a}} = n^{a}\) is used for the above calculation.

Choose the correct answer:

Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Both A and R are true, and R is the correct explanation of A.

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