The percent p of paved roads and streets in the United States can be approximated with the

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The percent p of paved roads and streets in the United States can be approximated with the equation

p = 14.32t0.38

where t is the number of years past 1950.

(a) Express this equation with radical notation.

(b) Does this equation estimate a greater percent change during the decade from 1970 to 1980 or during the decade from 2000 to 2010? What might explain this?

(c) When can you be certain this equation is no longer valid?

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