HSF.LE.A.2 math practice. Learn by doing.

You invest $\text{\char36}500$ at $10\%$ annual interest for $1$ year. What is the total?

The function $g$ is defined by $g(t) = 840(0.5)^{t/4}$. The function $g$ models the mass, in milligrams, of a medicine in a patient's bloodstream, where $t$ is the number of hours after an injection. According to the model, what is the estimated mass, in milligrams, of the medicine at the time of the injection?

Taxi cost, in dollars, after $x$ miles:
$\begin{array}{c|c} x & f(x) \\ \hline 1 & 6 \\ 2 & 10 \\ 3 & 14 \\ 4 & 18 \end{array}$
The cost is $f(x)=mx+2\textsf{.}$ What is $m\textsf{?}$

The table shows values of a linear function $g\textsf{.}$
$\begin{array}{c|c} x & g(x) \\ \hline 0 & 15 \\ 1 & 12 \\ 2 & 9 \\ 3 & 6 \end{array}$
Which of the following is $g(x)\textsf{?}$

A line has slope $4$ and passes through the point $(-1, 2)$. Which equation represents this line in point-slope form?

A substance has a half-life of $4$ years. What fraction remains after $12$ years?

The function $h$ is defined by $h(t) = 125(1.18)^t$. The function $h$ models the number of members in a club, where $t$ is the number of years after the club was founded. According to the model, what is the estimated number of members when the club was founded?

Tutoring cost, in dollars, for $x$ lessons:
$\begin{array}{c|cccc} x & 0 & 1 & 2 & 3 \\ \hline f(x) & 40 & 65 & 90 & 115 \end{array}$
The cost is $f(x)=25x+b\textsf{.}$ What is $b\textsf{?}$