Question

solve the formula $d = rt$ for $r$. a. $r = d - t$ b. $r = \frac{d}{t}$ c. $r = dt$ d. $r = \frac{t}{d}$

Explanation:

Step1: Isolate $r$ via division

Divide both sides of $d=rt$ by $t$:
$\frac{d}{t} = \frac{rt}{t}$

Step2: Simplify the right-hand side

Cancel $t$ on the right:
$\frac{d}{t} = r$

Step3: Rearrange to solve for $r$

Rewrite to isolate $r$:
$r = \frac{d}{t}$

Answer:

B. $r = \frac{d}{t}$