Mathematical Reasoning Module 1 Checkpoint

Researchers wanted to learn more about people who rent apartments and who have pets. They began a study of 971 renters. The researchers found that 216 of the renters in their study reported that they owned pets. Of the renters who owned pets, 2/3 of the renters owned a dog. What percentage of all renters in the study owned a dog?

• 15%

• 22%

• 50%

• 67%

• 75%

In 1915, the population of the United States was approximately 100,000,000. In 1968, the population was 200,000,000. Which of the following statements is true about the doubling time, that is, the period of time that was required for the United States population to double in size?

• The doubling time for the US population in 1968 was 53 years.

• The doubling time for the US population in 1915 is 1968.

• The doubling time for the US population is always 53 years.

• The doubling time for the US population in 1915 was 53 years.

• The doubling time for the US population in 1915 is 200,000,000.

On the TV show, The Biggest Loser, the winner is the person who lost the largest percentage of his/her weight. Three contestants, Courtney, Patrick and Antone have all lost weight on the show. At the start of the season Courtney weighed 270 pounds, Patrick weighed 387 pounds, and Antone weighed 447 pounds. If, at the end of the season, Courtney weighed 176 pounds, Patrick weighed 296, and Antone weighed 298 pounds, which one of them would win the “Biggest Loser” contest?

• Courtney

• Patrick

• Antone

• They all had the same percentage of weight loss.

• There is not enough information to determine who won.