book Maths Puzzle Numerical Ability

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List all of the potential rational zeros of the polynomial function.Do not attempt to find the zeros. f(x)

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book Other Question

(5x^-4y^-6z^5)(-4x^5y^5z^-3)(-4x^2yz^-1) Debit-card transactions. The total volume (in US dollars) of debit card transactions was $8.2 billion in 1990. In 1999, the total was $157.9 billion. Find the average rate of change in total debit card transactions from 1990 to 1999.