5) The graph below shows the weight of a person over a period of time. Which of the following describes the rate of change for this situation?
200
175
150
A The person lost 50lbs over the 5 month period.
B The the person gained 15lbs a month over the 5 month period.
C The person did not gain or lose any weight over the 5 month period.
D The person lost 10lbs a month over the 5 month period.
125
100
Weight (pounds)
75
SO
25
2 3 4 5
Time (months)

Solve for x, y, and z. show all steps.

What is the value of r of the geometric series?

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?