3short questions about stem-and-leaf !
1 how many twos would be listed in the stem area of a stem and leaf plot with the following data 12, 12, 22, 23, 33, 34, 36, 37, 48, 47?
a 1
b 3
c 4
d 2
2 how many twos would be listed in the leaf area of a stem and leaf plot with the following data 12, 12, 22, 23, 33, 34, 36, 37, 48, 47?
a 2
b 3
c 4
d 5
3 how many threes would be listed in the stem area of a stem and leaf plot with the following data 12, 12, 22, 23, 33, 34, 36, 37, 48, 47?
a 2
b 3
c 4
d 1

The table shows a pattern of exponents. what is the pattern as the exponents decrease?

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.