Assume It Costs 30 Cents to Mail a Letter Weighing

Multiple Choice

Assume it costs 30 cents to mail a letter weighing one ounce or less, and then 28 cents for each additional ounce or fraction of an ounce. Write a piecewise-defined function P(x) that represents the cost, in cents, of mailing a
Letter weighing between 0 and 3 ounces.

A) $\mathrm { P } ( \mathrm { x } ) = \left\{ \begin{array} { l l } 30 & \text { if } x \leq 1 \\ 58 & \text { if } 1 < x \leq 2 \\ 86 & \text { if } 2 < x \leq 3 \end{array} \right.$
B) $P ( x ) = \left\{ \begin{array} { l l } 30 & \text { if } x < 1 \\ 58 & \text { if } 1 \leq x < 2 \\ 86 & \text { if } 2 \leq x < 3 \end{array} \right.$
C) $P ( x ) = \left\{ \begin{array} { l l } 30 & \text { if } 1 < x \leq 2 \\ 58 & \text { if } 2 < x \leq 3 \\ 86 & \text { if } 3 < x \leq 4 \end{array} \right.$
D) $\mathrm { P } ( \mathrm { x } ) = \left\{ \begin{array} { l l } 58 & \text { if } x \leq 1 \\ 86 & \text { if } 1 < x \leq 2 \\ 114 & \text { if } 2 < x \leq 3 \end{array} \right.$