Do you mean the "E" in the motto, E Pluribus Unum? It's usually translated as "From Many, One" so I suppose it must be Latin for "from".
5ct
If you mean in 30 cents, there are 6 nickels (30 cents / 5 cents = 6) If you mean 30 dollars, the answer is 600 nickels (3000 cents / 5 cents)
Assuming you mean $4.7094, then $4.7094/$0.05=94.188 or 94 nickels
It's not clear what "go into 1000" means. If you mean "How many nickels are in $1000", the answer is 20,000 because a dollar is equivalent to 20 nickels If you mean "How much are 1000 nickels worth?", the answer is $50. A nickel is worth $0.05 so 1000*0.05= 50.
If by 500 you mean 500 cents then : 50 dimes or 100 nickels or 20 quarters. If you mean 500 dollars then: 5,000 dimes or 10,000 nickels or 2,000 quarters.
If you mean how many? 1,000
Assuming you mean $80,000,000 - there are 20 nickels in one dollar (5 cents x 20 coins), so there would be 80,000,000 x 20 = 1,600,000,000 nickels.
2 nickels in a dime
You could have: 8 nickels and 1 penny or 6 nickels and 11 pennies or 4 nickels and 21 pennies or 2 nickels and 31 pennies. The option of 0 nickels and 41 pennies is excluded by the necessity that the amount is made up of dimes, nickels and pennies; 0 nickels would mean the $1.21 was made up of dimes and pennies only.
A nickel is worth 5 cents. If by "20" you mean 20 cents, you need 20 / 5 = 4 nickels. If you mean 20 dollars, a dollar is 100 cents so $20 = 2000 cents, and you'd need 2000 / 5 = 400 nickels.
Nothing. You found change that people have dropped.
If you mean for collecting purposes, it would depend on the age, the mint markings and the condition. Otherwise, 37 quarters is $9.25 and 186 nickels is $9.30, so the nickels would be preferable by 5¢.