What is 1+2+3243245464576867123345435071293 87543987123987543098234876623409812 89374350982348971230985439873249871 23098345987432098345987654987234981 -2394875463782191023746372818234873 29324987272897324987239424278329473 82948372489328473284739284738927482 39748239749823749832748932749832748 92748932748932 times 234093284092384092384023984239?

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?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.