What is the value of #(4times10^-8)times(1times10^-12)#?

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Answer 1 · 2016-12-31T13:38:11

#4 xx 10^-20#

This can be rewritten as:

#4 xx 1 xx 10^-8 xx 10^-12#

#4 xx 10^-8 xx 10^-12#

Using the rule for exponents:

#color(red)(x^a xx x^b = x^(a+b))#

#4 xx 10^(-8 + -12)#

#4 xx 10^-20#