RWM101: Foundations of Real World Math

1. A zookeeper published the following stem-and-leaf plot showing the number of lizards at each major zoo in the country:
   
   $\begin{array}{|l|llllll}0 & & & & & & \\1 & & & & & & \\2 & 0 & 6 & 8 & 8 & 8 & \\3 & 0 & 2 & 6 & 6 & 7 & 8 \\4 & 1 & 2 & 6 & 6 & & \\5 & & & & & & \\6 & & & & & &\end{array}$
   
   Key: 4 |1=414 lizards
   
   What was the smallest number of lizards at any one zoo?
   
   
2. A zookeeper created the following stem-and-leaf plot showing the number of sloths at each major zoo in the country:
   
    $\begin{array}{|l|llll} 0 & 3 & & & \\ 1 & 6 & 7 & 7 \\ 2 & 0 & 4 & & & & \\ 3 & 0 & 1 & 1 & 2 & 4 & 7 & 9 & 9 \\ 4 & 1 & 2 & 3 & 5 & 7 \end{array}$
   
   Key: 4 |1=41 lizards
   
   How many zoos have exactly 17 sloths?
   
   
3. A statistician for a chain of department stores created the following stem-and-leaf plot showing the number of pairs of glasses at each of the stores:
   
    $\begin{array}{|l|llll} 0 & 9 & & & \\ 1 & 3 & 6 & 6 & 8\\ 2 & 1 & 2 & 3 & 5 & 6 & 9 \\ 3 & 0 & & & & && \\ 4 & 1 & 2 & 3 & 3 & 5& 7 \end{array}$
   
   Key: 4 | 1=41 pairs of glasses
   
   How many department stores have fewer than 38 pairs of glasses?
   
   
4. The government published the following stem-and-leaf plot showing the number of bears at each major zoo in the country:
   
   $\begin{array}{|l|lllll} 0 & & & & & & \\ 1 & 8 & 8 & & \\ 2 & 1 & 3 & 6 &6 &7&7&9 \\ 3 & 1& 7 & & & \\ 4 & 1 & 4 & 5 & 7 & & \\ 5 & 0 & 3 & & \end{array}$
   
   Key: 4 |1=414 bears
   
   How many zoos have more than 50 bears?
   

Source: Khan Academy, https://www.khanacademy.org/math/ap-statistics/quantitative-data-ap/histograms-stem-leaf/e/reading_stem_and_leaf_plots
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