###### Exercise18

In each situation, which number set do you think is most appropriate?

1. The number of dogs a student has owned throughout their lifetime.

This number is best considered as a

• natural number

• whole number

• integer

• rational number

• irrational number

• real number

.

2. The difference between the projected annual expenditures and the actual annual expenditures for a given company.

This number is best considered as a

• natural number

• whole number

• integer

• rational number

• irrational number

• real number

.

3. The length around swimming pool in the shape of a half circle with radius $$10\,\text{ft}\text{.}$$

This number is best considered as a

• natural number

• whole number

• integer

• rational number

• irrational number

• real number

.

4. The proportion of students at a college who own a car.

This number is best considered as a

• natural number

• whole number

• integer

• rational number

• irrational number

• real number

.

5. The width of a sheet of paper, in inches.

This number is best considered as a

• natural number

• whole number

• integer

• rational number

• irrational number

• real number

.

6. The number of people eating in a non-empty restaurant.

This number is best considered as a

• natural number

• whole number

• integer

• rational number

• irrational number

• real number

.

in-context