Andrew is planning to save allowance money for 20 years. In year one he saves $100, in year two he saves $120, in year three he saves $140, and so on.
a) How much does he save in the last year?

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?

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

Finding tbe values of the variables in each kite