The stem-and-leaf plot represents the ages of people watching a music concert. how many people are at least 30 years old? enter your answer in the box. a stem-and-leaf plot with a stem value of 1 with a leaf value of 5, 5, 6, 6, 7, 7, 8, 8, a stem value of 2 with a leaf value of 1, 4, 5, 9, and a stem value of 3 with a leaf value of 0, 5, 5, 6.

The stem plot represents that only 1 person is at least 30 years, 2 people who are 35 years old and 1 person with the age of 36 years old watching the music concert. 
In other words, there were 4 people ages 30 years old and abovewatching the concert
Explanation:We have 1,2,3  digits under the STEM column, and 55667788, 1459, 0556 under the LEAF column. the way to explicate a stem-and-a-leaf plot is that all digits under the LEAF ARE THE ONES DIGIT AND  ON THE STEM ARE THE TENTHS DIGITS. We will just go to put together the stem and the leaf digits.See figure below. 

STEM              LEAF                            PUT TOGETHER THE DIGITS 

1                      5 5 6 6 7 7 8 8             15, 15, 16, 16, 17, 17, 18, 18    (AGES)
2                     1 4 5 9                           21, 24, 25, 29                      (AGES)
3                     0 5 5 6                          30, 35, 35, 36                      (AGES)