Final answer:
The value of the expression (8.4 x 10^6) (1.4 x 10^12) in scientific notation is 1.176 x 10^19.
Step-by-step explanation:
To calculate the value of the expression (8.4 x 106) (1.4 x 1012) in scientific notation, we need to multiply the coefficients and add the exponents.
8.4 x 106 multiplied by 1.4 x 1012 equals (8.4 x 1.4) x (106 x 1012) = 11.76 x 1018. Finally, we can simplify this result by writing it in proper scientific notation as 1.176 x 1019.