Jason is buying a new computer. He is comparing various models using many different variables. These variables play an important role in making the decision about which computer he will buy. Identify each of the following variables as categorical or quantitative. A) Does the computer come with a USB port?
B) What is the hard drive size of the computer?
C) Is the computer a laptop or a desktop model?
D) How much does the computer cost?

a) Categorical

b) Quantitative

c) Categorical

d) Quantitative

Step-by-step explanation:

A variable can be classified as qualitative or quantitative.

Qualitative(Categorical):

When the possible values of the variables are labels, for example, good or bad, yes or no,...

Quantitative:

When the possible values of the variables are numbers, for example 1, 2, 1000,

A) Does the computer come with a USB port?

The possible answers are: yes or no, so it is a categorical variable

B) What is the hard drive size of the computer?

The answer is a number, so it is a quantitative variable.

C) Is the computer a laptop or a desktop model?

The possible answers are: yes or no, so it is a categorical variable

D) How much does the computer cost?

The answer is a number, so it is a quantitative variable.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)