Answer :
Answer:
B. r = A-p/pt
Step-by-step explanation:
We can rearrange the equation to make [tex]r[/tex] the subject of the equation:
[tex]A=p+prt[/tex]
[tex]A-p = p+prt-p[/tex]
[tex]A-p = prt[/tex]
[tex]\frac{A-p}{pt} = \frac{prt}{pt}[/tex]
[tex]r = \frac{A-p}{pt}[/tex]
∴ Option B is correct
Hope this helps :)