Awoman walks into a store and steals $100 from the register and leaves. she later returns purchasing $70 in merchandise giving the owner the $100 bill she stole. she received $30 in change. how much money did the store lose?

We just started the introduction into circles and i have no idea how to do this.

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca