Respuesta :

Answer:

Option A

Step-by-step explanation:

[tex]D=3ef^2\\[/tex]

we need to make e the subject of the formula so here goes,

On the right side 3 is being multiplied by ef^2 so when it moves to the left side it will divide

[tex]\frac{D}{3}=ef^2[/tex]

now f^2 is also being multiplied by e on the right side so when it moves to the left side it will divide

[tex]\frac{D}{3f^2}=e\\\\[/tex]

RELAXING NOICE
Relax