Which is an example of continuous data?

A) amount of snowfall in a blizzard
B) number of students who pass a math quiz
C) number of languages an individual speaks
D) number or treadmills in a gym

A) amount of snowfall in a blizzard  

Step-by-step explanation:

Both continuous and discrete data are quantitative.

The difference is that  

The amount of snowfall in a blizzard is continuous data.  It can take any value such as 100.3 cm or 250.5 cm .

B) is wrong. The number of students who pass a math quiz is discrete data. You can't have half a student.

C is wrong. The number of languages an individual speaks is discrete data. You can't speak half a language.  

D) is wrong. The number or treadmills in a gym is discrete data. You can't have half a treadmill.

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72