Question

1. using the graph to the right, how many adults do not carpool to work? a. 15 b. 50 c. 130 d. 160 15. mrs. james wants to measure the volume of a liquid very precisely. what is the best lab equipment she could use to do this? a. beaker b. test tube c. graduated cylinder d. erlenmeyer flask 16. which of the following is a quantitative observation? a. the dog has two legs. b. the dog is small. c. the dog is cute. d. the dog is fuzzy. part 2 safety: write the answer for the following questions below. you do not have to use complete sentences. point values are indicated next to each question. 17. what is the first thing you should always do before starting a lab? (1 pt) 18. what does p.a.s.s. stand for? hint: it refers to how to use a fire extinguisher. (4 pts) 19. shelley accidentally drops a test tube and it shatters. what two things should she make sure to do? (2 pts) 20. what should you always do at the end of a lab? (1 pt)

Explanation:

13.

Step1: Find total adults

From the bar - graph, the number of adults using bus is 80, car is 50, carpool is 15 and walk is 15. The total number of adults is \(80 + 50+15 + 15=160\).

Step2: Calculate non - carpool adults

The number of adults who do not carpool is the total number of adults minus the number of carpooling adults. So, \(160-15 = 145\). There seems to be an error in the options provided. If we assume we are only considering the non - carpooling adults among the non - walkers (since the problem may be mis - worded and we focus on the main non - carpooling groups other than walkers), the number of non - carpooling adults among bus and car users is \(80 + 50=130\).

A beaker is used for general mixing and holding liquids but not for precise volume measurement. A test tube is used for holding and reacting small amounts of substances, not for precise volume measurement. An Erlenmeyer flask is used for mixing and heating liquids, not for precise volume measurement. A graduated cylinder is designed for precise measurement of liquid volume.

A quantitative observation is one that involves a number or amount. "The dog has two legs" is a quantitative observation as it involves a numerical value. "The dog is small", "The dog is cute" and "The dog is fuzzy" are qualitative observations as they describe qualities or characteristics.

Answer:

C. 130

15.