The right-hand "tail" of the standard normal curve can be defined as the part that lies at least 2 standard deviations to the right of the mean. The left-hand
"tail" can be defined as the part that lies at least 2 standard deviations to the
left of the mean.
According to the empirical rule, approximately what percentage of the area
under the whole curve is in the two tails? (Hint: Find the percentage for each
tail individually.) Round your answer to the nearest tenth.
A. 5%
B. 2.5%
C. 16%
D. 32%
SURAT

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?

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning