Exercise 2 - solution

750 ml at 30 g per 500 ml: 750 / 500 x 30 = 45 g coffee.
Ratio: 750 / 45 = 16.7:1 (same as before, inside the 15-18:1 range).

Extra line:
print(f"94 C = {c_to_f(94):.0f} F")

Output:
94 C = 201 F

The article's range is 93-96 C (199-205 F), so 94 C (201 F) is inside it.