How do you simplify and write #(1.0times10^-15)/(4.2times10^-7)# in scientific notation?

1 Answer
Jul 27, 2016

Answer:

#2.38*10^-9#

Explanation:

How I usually answer questions like this I ignore the exponents first and divide the numbers as usual
#1.0/4.2=0.238#

Now I take care of the exponents since we're dividing you subtract the exponents
#-15-(-7)=-8#

So now we have
#0.238*10^-8#

We have to move the decimal back to make it proper scientific notation, so the answer is
#2.38*10^-9#