A Coast Guard ship is responsible for searching an area that is 5,000 square miles. Which shows 5,000 as a whole number multiplied by a power of ten?

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Simplify the expression. -2/5(10+15m-20n)

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.