Rearranging Formulas to Highlight Quantities Practice Test

In finance, compound interest can be modeled by $A = P(1+r)^t$, where $A$ is final amount, $P$ is principal, $r$ is interest rate per period, and $t$ is the number of periods. Solve $A = P(1+r)^t$ for $P$.

In physics, the kinematic equation $v^2 = u^2 + 2as$ relates final speed $v$, initial speed $u$, acceleration $a$, and displacement $s$. Solve $v^2 = u^2 + 2as$ for $a$ (treating the other variables as constants, as in solving a numeric equation).