Ts A car rental company charges a daily rate of $36 plus $0.30 per mile for a certain car. Suppose that you rent that car for a day and your bill (before taxes) is $186.
How many miles did you drive?

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