Question

To stay underwater, divers need air that contains enough Oxygen. However, Oxygen under high pressure can act like poison in the body, so the recommended percentage of Oxygen in the air changes as you dive deeper. The percentage of Oxygen (P) recommended at depth d meters is calculated a using the formula

P= 1980/d + 99

At sea level the percentage of Oxygen in the air is approximately 20%. Explain how this compares to the value calculated using the formula.

Answer 1

Answer:

This value doesn't match the formula

At sea level, d = 0

If we substitute in the formula we get:

P = 1980/0 + 99

This value is undefinable and near ∞

So, the formula isn't applicable