Rewrite 0.37 in expanded form using powers of ten. a) (3 × 1) + (7 × 10) b) (3 × 10) + (7 × 100) c) (3 × 1 10 ) + (7 × 1 100 ) d) (3 × 1 100 ) + (7 × 1 1000 )

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g