3-12 a

3-12 b

3-12 c

3-15 a

3-15 b

3-18

3-21 a

3-21 b

Questions and Answers

- 1.
### 3-12Find the Giant 1 and then determine the numerator? ___/18

- 2.
**3-12Find the Giant 1 and then determine the denominator. 4/___**Explanation

The question asks to find the denominator of the fraction 4/___ after finding the Giant 1. The Giant 1 is located at the numerator of the fraction 4/9. Therefore, the denominator of the fraction is 9.Rate this question:

- 3.
**3-12Find the Giant 1 then determine the numerator. ____/100.**Explanation

In the given question, we are asked to find the numerator of the fraction represented by the blank space. The numerator is given as 45.Rate this question:

- 4.
**3-15**Explanation

The given answer consists of three options: 22.45 cm, 22.45 centimeters, and 22.45. These options all represent the same length measurement, which is 22.45 units. The use of both "cm" and "centimeters" indicates that the measurement is in centimeters, and the numerical value of 22.45 represents the length itself.Rate this question:

- 5.
**3-15**Explanation

The given answer options all represent the measurement of an area or quantity. The number 28 can be interpreted as 28 units, which could refer to any type of unit of measurement. It can also be interpreted as 28 units squared or 28 square units, indicating that the measurement is in two dimensions. Additionally, it can be expressed as 28 sq units or 28 sq. units, which are alternative ways of denoting square units. Therefore, all the given answer options are valid representations of the measurement 28.Rate this question:

- 6.
### 3-18. If five notebooks cost $5.25, how much would three notebooks cost?

Explanation

The cost of notebooks is directly proportional to the number of notebooks. If five notebooks cost $5.25, then the cost of each notebook is $1.05. Therefore, three notebooks would cost $3.15.Rate this question:

- 7.
### 3-21. Stacy exercises three days each week by walking around the soccer field near her home. The field is 80 yards wide and 115 yards long.1. Draw a diagram of the field. Then find how far Stacy walks in one trip around the field. This distance is called the perimeter.

Explanation

Stacy walks around the soccer field, which has a width of 80 yards and a length of 115 yards. To find the perimeter, we add up the lengths of all four sides of the field. The two shorter sides have a length of 80 yards each, and the two longer sides have a length of 115 yards each. Adding these lengths together, we get 80 + 80 + 115 + 115 = 390 yards. Therefore, Stacy walks a distance of 390 yards in one trip around the field.Rate this question:

- 8.
### 3-21. Stacy exercises three days each week by walking around the soccer field near her home. The field is 80 yards wide and 115 yards long. (Use your answer from the last question to help you solve this one.)2. If Stacy walks around the field four times each time she exercises, how far does she walk each week?

Explanation

Stacy walks around the field four times each time she exercises. The field is 80 yards wide and 115 yards long. To calculate the distance she walks each time, we add the length of all four sides of the field. The perimeter of the field is 2 times the sum of the width and length, which is 2(80 + 115) = 2(195) = 390 yards. Since Stacy walks around the field four times, the total distance she walks each time she exercises is 4 times the perimeter, which is 4(390) = 1560 yards. Therefore, she walks a total of 1560 yards each week.Rate this question:

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