Question

Complete the following by inserting the appropriate numbers and then calculate the final answer (in the correct number of significant figures). You must show your units canceling. a. 15 hours _minutes hours

b. 17 feet meter feet c. 25 gallon squarts pints _gallon quart
d. 700 seconds_minute hour day_second minutes hours

Answer 1

The exercise involves conversions between different units of time and volume, and determining the number of significant figures in various numbers. Conversions are done using multiplication by conversion factors, and significant figures are counted according to standard rules.

Step-by-step explanation:

The question involves unit conversions with a focus on time and volume as well as calculation of significant figures. Here are three examples of how to convert the given units:

• 15 hours to minutes: To convert hours into minutes, multiply by 60 (since there are 60 minutes in an hour). 15 hours × 60 minutes/hour = 900 minutes.
• 17 feet to meters: To convert feet to meters, multiply by 0.3048 (since there are 0.3048 meters in a foot). 17 feet × 0.3048 meters/foot = 5.1816 meters (to four significant figures).
• 25 gallons to quarts to pints: First, convert gallons to quarts, knowing there are 4 quarts in a gallon, then quarts to pints, knowing there are 2 pints in a quart. 25 gallons × 4 quarts/gallon × 2 pints/quart = 200 pints.

Determining the number of significant figures:

1. 0.0009 has one significant figure.
2. 15,450.0 has six significant figures.
3. 6x10³ (or 6000) has one significant figure.
4. 87.990 has five significant figures.
5. 30.42 has four significant figures.