How to simplify $(3 times 10^7)(5 times 10^4)$ in scientific notation?

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Answer 1 · 2015-11-01T22:58:53

You multiply the numbers and add the 10-powers

$=(3*5)*10^(7+4)=15*10^11$

Since scientific notation allows only one non-zero before the decimal point, you will have to make make an extra step:

$=1.5*10*10^11=1.5*10^12$

How to simplify (3 times 10^7)(5 times 10^4)(3 times 10^7)(5 times 10^4) in scientific notation?