Physics, asked by gurleenkaur2004, 8 months ago

multiply the number and round off 42.7 and 421.49

Answers

Answered by kalavathibathina1717

Answer:

42.7 rounded off to near value = 43

421.49 rounded off to nearest equals 421

42 into 421 equals 17682

Answered by Mihir1001

$\bold{Answer:}$

$\huge\boxed{18.0 \times 10^3}$

$\bold{Step-by-step-explaination:}$

we have,

$42.7 \times 421.49$

$= (4.27 \times {10}^{1} ) \times (4.2149 \times {10}^{2} )$

$= (4.27 \times 4.2149) \times {10}^{(1 + 2)}$

$= 17.997623 \times {10}^{3}$

On rounding of to 3 significant digits, we get : $18.0 \times {10}^{3}$

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