calculate the following round off to the correct number of significant figures and express your result in scientific notation. A). (200.9) (569.3) B.) (0.000000513) (62.3x10^7)

A) 1.144*10^5

B) 3.20*10^2

Explanation:

A) Both of the numbers are in 4 significant figures, so we write answer in 4 significant figures.

B) Both of the numbers are in 3 significant figures, so we write answer in 3 significant figures.