An electronic product takes an average of 8 hours to move through an assembly line. if the standard deviation of 0.4 hours, what is the probability that an item will take between 8.4 and 9.1 hours to move through the assembly line?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

Graph the line y=4/3 x+1 . use the line tool and select two points on the line.

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220