Tests scores for a statistics class have a mean of 82 and standard deviation of 2. A histogram shows a non-normal distribution. What is the value for k for the interval between 74 and 90 scores?

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)

How to simply and write the answer n a whole number