Question

Write the expression as a number in scientific notation.
(5 x 10^2)(4.2 x 10^4)/6 x 10^3

Answer 1

3.5 x 10^3


I haven’t done this in a while but… I believe this is right

5 time 4.2= 21
And 10^2 times 10^4 is 10^6

So 21 x 10^6/6x10^3

21/6 is 3.5 and 10^6/10^3 is basically 10^6-3

So it would be

3.5 x 10^3