A multiple choice test is given with 5 choices for each of 25 questions. suppose the test is answered by guessing. A) what is the random variable x defined to be?
B) what is the probability of gifted at least 10 questions correct?
C) what is the expected number of questions answered correctly by guessing
D) what is the standard deviation of this distribution?

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)