Answer: OPTION D: 
Step-by-step explanation:
By definiton, fractions have the following form:

Where "a" is called numerator and "b" is the denominator. The numerator and the denominator are Integers.
In order to solve this exercise you need to remember de Division of fractions:

In this case, according to the information given in the exercise, you know that
of rubies are divided into 4 lots.
Therefore, in order to calculate the weight in pounds of each lot, you need to divide
by 4.
Then, you get the following result:

As you can notice, this result matches with the Option D.
Answer:
80 magazines sold
Step-by-step explanation:
120*2/3=80
The length of somebody's arm depends on the person. Not everyone has the same length of arm.
Answer:
$33.915 for the cd
Step-by-step explanation:
70% of 19.95 = 13.965
19.95 + 13.965= 33.91