A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes
a random sample of 15 people and obtains the following results. 11, 9, 8, 10,
10, 9, 7, 11, 11, 7, 6, 9, 10, 8, 10. From past studies, the publisher assumes o
is 1.5 minutes and that the population of times is normally distributed. The
90% confidence interval for uis
(Sample mean = 9.1)

What is the slope of a line that is perpendicular to y = 3x + 1

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)