George eats 22 cookies per week, 7 of them are on weekends. If George eats an equal amount of cookies
each weekday, how many does he eat each weekday?

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?

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Can someone me do math because i am having a breakdown rn because i don’t get it