g Train Tracks are made of metal. They expand when it is warm and shrink when it is cold. When riding on a train you hear the clickety-clack of the wheels going over small gaps left in the tracks to allow for expansion. Suppose someone lay the track and forgot to put in the gaps so that the track is 1 mile long and firmly fixed at each end. On a hot day, suppose the track expanded by a total of 2 feet and therefor buckled in the middle creating a triangle. How high would the midpoint be

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

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)