Question

Please Answer I’m desperate

Answer 1

You simply have to multiply both sides by lambda:

$f = \dfrac{C}{\lambda} \iff f\cdot \lambda = \dfrac{C}{\lambda}\cdot \lambda \iff C = f\lambda$

Answer 2

Answer:

B

Step-by-step explanation:

Given

f = c / λ ( multiply both sides by λ )

fλ = c