Select the correct answer.
the radius of the crab nebula is approximately 5.225 x 1013 kilometers. use the conversion factor 1 light-year = 9.5 x 1012
kilometers to find the radius in light-years.
o 2.0 ly
9 5.5 ly
0 7.0 ly
- 8.0 ly
- 10.0 ly

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?

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?