A new car is purchased for $29,000 and over time its value depreciates by one half every 3.5 years. What is the value of the car 20 years after it was purchased, to the
nearest hundred dollars?

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