def sound_speed(gama: float, atmospheric_pressure: float,
                air_density: float) -> float:
    """Calculates the speed of the sound in air.

    Args:
        gama (float): Specific heat ratio [no units].
        atmospheric_pressure (float): Atmospheric pressure [Pa].
        air_density (float): Air density [kg/(m^3)]

    Returns:
        float: Sound speed in the air [m/s].
    """
    return (gama * atmospheric_pressure / air_density) ** 0.5