Answer to Question #6232 in Algebra for Ben

Question

estimate the order of magnitude of the answer for each of the following calculations:
a) (6.2 x 10^20) x (3.8 x 10^-18) b) (600) x (10 x 10^8)
c) 5.4 x 10^-12 divide by 3.1 x 10^-15
the answers are: a) 10^3 or 10^4 if converted to OM first. b) 10^12
c) 10^3 or 10^4 if converted to OM first.