The overhead reach distances of adult females are normally distributed with a mean of 202.5 cm and a standard deviation of
7.8 cm. choose the correct answer below.

a. the normal distribution can be used because the mean is large.
b. the normal distribution can be used because the finite population correction factor is small.
c. the normal distribution can be used because the original population has a normal distribution.
d. the normal distribution can be used because the probability is less than 0.5

Find the solution of system of equation y= x-4 y=4x+2

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?

Find x to the nearest hundredth place