What’s the first step when adding 1.45 • 10^8 and 3.9 • 10^7

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2