Evaluating functions in context. Game on.

$b = 100 - 4h$

The equation shown gives the estimated battery charge $b\textsf{,}$ as a percent, remaining on a laptop after $h$ hours of use, where $0 \le h \le 20\textsf{.}$ What is the estimated battery charge, as a percent, remaining on the laptop after $12$ hours of use?

$p = 320 - 40d$

The equation shown gives the estimated number of pages $p$ left to read in a book after $d$ days of a reading plan, where $0 \le d \le 8\textsf{.}$ What is the estimated number of pages left to read after $5$ days of the reading plan?

$s = 18 - \dfrac{n}{2}$

The equation shown gives the estimated snow depth $s\textsf{,}$ in inches, remaining on a trail $n$ days after a storm, where $0 \le n \le 24\textsf{.}$ What is the estimated snow depth, in inches, remaining on the trail $10$ days after the storm?

$a = 250 + 15w$

The equation shown gives the estimated balance $a\textsf{,}$ in dollars, in a savings account after $w$ weeks of deposits, where $0 \le w \le 20\textsf{.}$ What is the estimated balance, in dollars, in the savings account after $6$ weeks of deposits?

$r = 120 - 8s$

The equation shown gives the estimated number of raffle tickets $r$ remaining after $s$ sales periods at a festival booth, where $0 \le s \le 15\textsf{.}$ What is the estimated number of raffle tickets remaining after $7$ sales periods?

$g = 9 - \dfrac{m}{4}$

The equation shown gives the estimated amount of paint $g\textsf{,}$ in gallons, remaining after covering $m$ square meters of wall, where $0 \le m \le 36\textsf{.}$ What is the estimated amount of paint, in gallons, remaining after covering $12$ square meters of wall?

$T = 72 + 3c$

The equation shown gives the estimated oven temperature $T\textsf{,}$ in degrees Fahrenheit, after $c$ heating cycles during a warm-up, where $0 \le c \le 10\textsf{.}$ What is the estimated oven temperature, in degrees Fahrenheit, after $5$ heating cycles?

$f = 20 - \dfrac{n}{2}$

The equation shown gives the estimated amount of flour $f\textsf{,}$ in cups, remaining after baking $n$ cookies, where $0 \le n \le 40\textsf{.}$ What is the estimated amount of flour, in cups, remaining after baking $12$ cookies?