Last year kira opened an investment account with $7200. At the end of the year, the amount in the account had decreased by 22.5%. How much is this decrease in dollars? How much money was in her account at the end of last year?

Decrease in amount:

Year-end amount:



Dropping less than two inches per mile after emerging from the mountains, a river drains into the ocean. one day's discharge at its mouth, 5.6 trillion gallons, could supply all of country a's households for seven months. based on this statement, determine how much water an average household uses each month. assume that there are 100 million households in country a. country a uses approximately nothing gallons per household per month.

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What are the possible rational zeros of [tex]f(x) = x^4+2x^3-3x^2-4x+18[/tex]