Artie needs to save $450 to buy the new bicycle that he wants. He currently has $300. What percent of the new cost of a new bicycle has he saved? Claire decides to solve this problem by setting up a proportion. What should her proportion look like?

A.) 300/100 + x/450

B.) x/100 = 450/300

C.) x/100 = 450/300

D.) 450/100 = x/300

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?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?