Express the answer using scientific notation; retain all nonzero decimal places. (1.9 • 104) • (8.4 • 105)

(1.9*104)*(8.4*105)=

1.09*1.04*10^2*8.4*1.05*10^2=
1.09*1.04*8.4*1.05*10^4=
17.42832*10^4=
1.742832*10*10^4=
1.742832*10^5

what are the answers?

To express the given expression using scientific notation, we need to multiply the coefficients and add the exponents:

(1.9 • 10^4) • (8.4 • 10^5)

To multiply the coefficients, simply multiply 1.9 and 8.4:

1.9 • 8.4 = 15.96

To add the exponents, add 4 and 5:

10^4 • 10^5 = 10^(4+5) = 10^9

Putting it all together, the answer in scientific notation is:

15.96 • 10^9