Question 183049
Step 1) Multiply the coefficients 8.4 and 6.5 to get {{{8.4*6.5=54.6}}}


Step 2) Convert the previous result to scientific notation (if it is not already). So {{{54.6=5.46*10^1}}}



So this means that the expression {{{(8.4*10^3)(6.5*10^5)}}} now becomes {{{5.46*10^1*(10^3)*(10^5)}}}



Step 3) Now multiply out {{{10^1*(10^3)*(10^5)}}} by adding the exponents: {{{10^1*(10^3)*(10^5)=10^(1+3+5)=10^9}}}



Now putting everything together, we get the result {{{5.46*10^9}}}


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Answer:


So {{{(8.4*10^3)(6.5*10^5)=5.46*10^9}}}