TIME REMAINING
51:35
William is in the middle of swimming in a ten-mile race. He swims at a steady speed, and then slows down, stops to eat,
swims faster to get back in the race, and returns to a steady speed. He later stops for water, and then again swims faster to
get back in the race. Which graph best represents the situation?

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

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?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?