Question

(3.2534x10^4m)+(7.25x10^6m)/(4.26442x10^-3km)-(7.1299x10^-5km)

Answer 1

I wish I knew what the unit is. I assume significant figures.

(n the numerator:
3.2534x10^4m)+(7.25x10^6m)
(.03256+7.25)E6= 7.25E6m
in the denominator.
4.26442x10^-3km)-(7.1299x10^-5km)
4.26442x10^0 m)-(7.1299x10^-2m)
4.26442 m)-(0.071299 m)E0
4.26442 -0.071299
4.19312E0

so we have then
7.25E6/4.19312=1.70 E6