4. The doubling time for a city's population is 10 years. In

Last updated: 7/13/2022

4. The doubling time for a city's population is 10 years. In 30 years the population will be times the initial population a) 2 b) 3 c) 4 d) 8 5. Which of the following is not a good approximation of doubling time? a) A population growing at 2% per year will double in 35 years. b) A population growing at 1% per year will double in 70 years. c) A population growing at 10% per year will double in 7 years. d) A population growing at 35% per year will double in 2 years. 6. The half-life of a drug in the bloodstream is 14 hours. What fraction of the original dose is left in the bloodstream after 56 hours? a) 1/4 b) 1/8 c) 1/16 d) 1/32