Write an equation that represents the maximum and minimum chlorine concentration

Question

Chlorine is added to a swimming pool to sanitize the water and make it safe for swimming. The chlorine should be in the range 2-4ppm (parts per million). Write an equation that represents the maximum and minimum chlorine concentration

Answer 1

Hello, Keylee,

I might be misunderstanding your question, but I believe the best expression that would meet this requirement is:

2ppm ≤ x ≤ 4ppm

Bob