6. A new shoe comes in three colors: red, white, or black. It also comes in sizes 5 to 9. The sample space for randomly selecting a pair of the shoes
for a display is shown below.{red, 5; red, 6; red, 7; red, 8; red, 9; white, 5;
white, 6; white, 7; white, 8; white, 9; black, 5; black, 6; black, 7; black, 8;
black, 9) What is the probability a clerk will select a white shoe that is
either a 7 or 8 for the display?*
A. 1/8
B. 2/15
C. 1/3
D. 2/5

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?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212