Perform the subtraction considering significa | vedclass

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(B) To subtract numbers in scientific notation,we first express them with the same power of $10$.$3.9 	imes 10^5 = 39.0 	imes 10^4$.Now,perform the

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$3.6 	imes 10^5$

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(B) To subtract numbers in scientific notation,we first express them with the same power of $10$.$3.9 	imes 10^5 = 39.0 	imes 10^4$.Now,perform the subtraction: $(39.0 	imes 10^4) - (2.5 	imes 10^4) = (39.0 - 2.5) 	imes 10^4 = 36.5 	imes 10^4$.Convert this back to standard scientific notation: $3.65 	imes 10^5$.According to the rules of significant figures for subtraction,the result should be reported to the same number of decimal places as the measurement with the fewest decimal places. Here,$3.9 	imes 10^5$ has one decimal place (when expressed as $39.0 	imes 10^4$) and $2.5 	imes 10^4$ has one decimal place. Thus,the result should be rounded to one decimal place.Rounding $3.65 	imes 10^5$ to one decimal place gives $3.6 	imes 10^5$ (following the rule of rounding to the nearest even number or standard rounding convention).

Perform the subtraction considering significant figures: $3.9 \times 10^5 - 2.5 \times 10^4$

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