5. (ex. 8, p.142) COST ANALYSIS: A hot dog vendor pays $25 a day to rent a pushcart and $1.25 for the ingredients in one hot dog.
a Find the cost of selling x hot dogs in 1 day.
b) What is the cost of selling 200 hot dogs in one day.
c) If the daily cost is $355, how many hot dogs were sold that day?

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

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?

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.