Amine extracts 2 metric tons of coal in an hour. the mine uses 14 ton of the extracted coal every hour to generate electricity for the mine and sells the rest. if t is the number of hours spent mining, which expression represents the amount of ore sold? how much ore can the mine sell after extracting ore for 12 hours?

answer: asdfghjkl,mnbv

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."