solve and write in scientific notation 1.64x10^3+1.4x10^4+7.5x10^3

Answer 1

1.64x10^3 = 1640
1.4x10^4 = 14000
7.5x10^3 = 7500

now add them up, then convert back to SN

Answer 2

1.64*10^3+0.14*10^3+7.5*10^3 = 76.78*10^3 = 7.678*10^4.