A radioactive isotope decays at 5 mg5 \text{ mg}5 mg per 10 hours10 \text{ hours}10 hours. How many grams will decay in 1 week1 \text{ week}1 week?
0.084 g0.084 \text{ g}0.084 g
0.84 g0.84 \text{ g}0.84 g
8.4 g8.4 \text{ g}8.4 g
0.0084 g0.0084 \text{ g}0.0084 g