Question

M. Section 4.1

Answer 1

According to the given function, it is found that fewer than 38.1% of U.S. voters will use punch cards or lever machines starting from the year of 2004.

What is the function?

$P(t) = -2.5t + 63.1$

• In which t is the number of years after 1994.

It will be fewer than 38.1% when:

$P(t) < 38.1$

Hence:

$-2.5t + 63.1 < 38.1$

$-2.5t < -25$

$2.5t > 25$

$t > 10$

Fewer than 38.1% of U.S. voters will use punch cards or lever machines starting from the year of 2004.

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