The greatest possible error of 18.9m is 18.95m - 18.85m = 0.1m
The number of scores that are less than 72 is 12.
Solution:
In the given histogram represents the scores of golfers.
x-axis represents the scores and y-axis represents the number of scores.
Number of scores between 66 - 67 = 4
Number of scores between 68 - 69 = 2
Number of scores between 70 - 71 = 6
Number of scores between 72 - 73 = 2
Number of scores between 74 - 75 = 2
To determine the number of scores that are less than 72.
Number of scores less than 72 = 4 + 2 + 6
= 12
Hence the number of scores that are less than 72 is 12.
Same side angles together form angle with measure 180^{0}. Let x be a measure of smaller angle, then x+20^{0} is measure of bigger angle.
x+x+20^{0}=180^{0}
2x=160^{0}
x=80^{0}.
So measure of smaller angle is 80^{0} and measure of bigger angle is x+20^{0}=80^{0}+20^{0}=100^{0}.
The correct answer is 1 mm Hg per year.
