A forest products company claims that the amount of usable lumber in its harvested trees averages 142 cubic feet and has a standard deviation of 9 cubic feet. Assume that these
amounts have approximately a normal distribution.
What percent of trees contain between 133 and 169 cubic feet of lumber?

When i did the math i got 11 cm

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.