The stem-and-leaf diagram below shows the highest wind velocity ever recorded in 30 different U.S. cities. The velocities are given in miles per hour. The leaf unit is 1.0.
$$\begin{array} { l | l }
6 & 4 \
7 & 23 \
7 & 589 \
8 & 0111344 \
8 & 5568899 \
9 & 0012234 \
9 & 559
\end{array}$$
How many of the maximum wind velocities are 85 miles per hour or higher?
A) 7
B) 18
C) 17
D) 2

Question

The stem-and-leaf diagram below shows the highest wind velocity ever recorded in 30 different U.S. cities. The velocities are given in miles per hour. The leaf unit is 1.0. 
$$\begin{array} { l | l } 
6 & 4 \
7 & 23 \
7 & 589 \
8 & 0111344 \
8 & 5568899 \
9 & 0012234 \
9 & 559
\end{array}$$
How many of the maximum wind velocities are 85 miles per hour or higher? 
A) 7
B) 18
C) 17
D) 2

Quizplus · Accepted Answer

The stem-and-leaf plot shows wind velocities in miles per hour, with the stem representing the tens place and the leaf representing the ones place. To find velocities of 85 mph or higher, we look for leaves in the "8" stem that are 5 or higher and all leaves in the "9" stem. In the "8" stem, there are 6 velocities (5568899) that are 85 mph or higher, and in the "9" stem, there are 11 velocities (0012234559), making a total of 17 maximum wind velocities of 85 mph or higher.

The Stem-And-Leaf Diagram Below Shows the Highest Wind Velocity Ever 6472375898011134485568899900122349559\begin{array} { l | l } 6 & 4 \\7 & 23 \\7 & 589 \\8 & 0111344 \\8 & 5568899 \\9 & 0012234 \\9 & 559\end{array}6778899​423589011134455688990012234559​

The Stem-And-Leaf Diagram Below Shows the Highest Wind Velocity Ever $\begin{array} { l | l } 6 & 4 \\7 & 23 \\7 & 589 \\8 & 0111344 \\8 & 5568899 \\9 & 0012234 \\9 & 559\end{array}$