#3) The annual earnings of 14 randomly selected computer software engineers have a sample standard deviation of $3725. Assume the sample is from a normally distributed population. Construct an 80% level of confidence for the population standard deviation. Interpret the results.

What are “like terms”? why can we only add like terms?

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)

To decrease an amount by 16% what single multiplier would you use