For each sample given, list two possible populations they could belong to.

1. Sample: The prices for apples at two stores near your house.
2. Sample: The days of the week the students in your math class ordered food during the past week.
3. Sample: The daily high temperatures for the capital cities of all 50 U.S. states over the past year.

The box plot displays the data on the response times of 100 mice to seeing a flash of light. How many mice are represented by the rectangle between 0.5 and 1 second?

Compare the weights of the backpacks for the students in these three classes.

A dot plot, seventh grade, “backpack weight in pounds”.  The numbers 8 through 25 are indicated. The data is as follows: 8 pounds, 3 dots. 9 pounds, 5 dots. 10 pounds, 7 dots. 11 pounds, 6 dots. 12 pounds, 2 dots. 13 pounds, 1 dot. 14 pounds, 1 dot.

A dot plot, ninth grade, “backpack weight in pounds”.  The numbers 8 through 25 are indicated. The data is as follows: 12 pounds, 3 dots. 14 pounds, 1 dot. 15 pounds, 2 dots. 16 pounds, 2 dots. 17 pounds, 2 dots. 18 pounds, 6 dots. 19 pounds, 2 dots. 21 pounds, 3 dots. 22 pounds, 3 dots. 23 pounds, 1 dot.

A dot plot, eleventh grade, “backpack weight in pounds”.  The numbers 8 through 25 are indicated. The data is as follows: 9 pounds, 1 dot. 11 pounds, 1 dot. 13 pounds, 1 dot. 14 pounds, 1 dot. 15 pounds, 3 dots. 16 pounds, 3 dots. 17 pounds, 2 dots. 19 pounds, 3 dots. 20 pounds, 2 dots. 21 pounds, 3 dots. 22 pounds, 2 dots. 24 pounds, 2 dots. 25 pounds, 1 dot.

Evaluate each expression:

1. \(\text-12 \boldcdot \frac13\)

2. \(\text-12 \boldcdot \text{-}\frac {1}{3}\)

3. \(12 \boldcdot \left(\text{-}\frac {5}{4}\right)\)

4. \(\text-12 \boldcdot \left(\text{-}\frac {5}{4}\right)\)

A bookstore has marked down the price for all the books in a certain series by 15%.

1. How much is the discount on a book that normally costs \$18.00?
2. After the discount, how much would the book cost?