Q. Add. Write your answer in scientific notation.(5×105)+(3.9×105)Choices:(A) 8.9×105(B) 7.2×1010(C) 8.9×1010(D) 7.2×105
Identify Coefficients: We have:(5×105)+(3.9×105)Since the powers of 10 are the same, we can directly add the coefficients.What is 5+3.9?5+3.9=8.9
Convert to Scientific Notation: Write the answer in scientific notation.Substitute 8.9 for the coefficient and 5 for the exponent in a×10b.Scientific notation: 8.9×105
Find Equivalent Expression: Choose the equivalent expression for (5×105)+(3.9×105).(5×105)+(3.9×105)=8.9×105(5×105)+(3.9×105) is equivalent to 8.9×105.
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