Evaluate the expression.Express the result in scientific notacion:

Question

(7.1x10^5)-(4.3x10^2)

Answer 1

First, you have to have the same power of 10, so

4.3x10^2 = .0043x10^5

Now subtract the coefficients to get
(7.1-.0043)x10^5 = 7.0957x10^5