12. Consider the following data which describe the amount of time in minutes students spend studying for a quiz: 10, 11, 11, 12, 12, 14, 15, 18, 19, 20, 22, 24, 39, 40, 41, 44, 46, 50, 52, 52, 53, 55, 70. What numbers make up the leaf of the first stem

The  numbers are

       LEAF:  0 1 1 2 2 4 5 8 9   0 2 4  9   0 1 4 6   0 2 5  0

Step-by-step explanation:

From the question we are told that

  The data given is  10, 11, 11, 12, 12, 14, 15, 18, 19, 20, 22, 24, 39, 40, 41, 44, 46, 50, 52, 52, 53, 55, 70.

Generally the given data can be grouped into stem and  leaf as show below

    Stem                          Leaf

1                         0 1 1 2 2 4 5 8 9

2                         0 2 4

3                        9

4                         0 1 4 6

5                         0 2 5  

7                           0

The  manner in which this grouping is done is  , the first digit of each element of the data set is made a stem while the second digit is made a leaf so from the above grouping we can deduce that the leaf is  

   LEAF:  0 1 1 2 2 4 5 8 9   0 2 4  9   0 1 4 6   0 2 5  0

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.