SOLUTION: (4x10^-11)x(7x10^6)=28x10^-5=2.8x10^-4=0.00028 my question:how does the decimal point get there (2.8) and why has the exponent (10) been decreased?

Question 176124This question is from textbook BARRONS ALGEBRA THE EASY WAY
: (4x10^-11)x(7x10^6)=28x10^-5=2.8x10^-4=0.00028
my question:how does the decimal point get there (2.8) and why has the exponent (10) been decreased? This question is from textbook BARRONS ALGEBRA THE EASY WAY

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

Replace with

Traditionally, the coefficient in scientific notation takes on values between 1 and 10. That's why 28 was replaced with 2.8x10^1. But the values are identical, as are all of the values below.

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