The prices of a particular variety of rice, per kilo- gram, collected from 48 local stores in the suburban areas of a district vary with a mean of $3 and a standard deviation of $1.6. (a) construct a 95% confidence interval for the mean price. (b) with 95% confidence, what can we assert about the possible size of our error if we estimate the mean price of rice for all the stores in the area as $

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)