The wavelength of a radio signal broadcast at frequency 99.0 MHz is?

$$f= 99 \times 10^6 s^{-1}$$

The wavelength of a radio signal is given by the formula:

$$\lambda=\frac{c}{f}$$

Where:

$$\lambda$$ is the wavelength in meters,

$$c$$ is the speed of light $$ (3 \times 10^8\ ms^{-1})$$, and

$$f$$ is the frequency in hertz.

Substituting the given values into the formula, we get:

$$\lambda=\frac{3 \times 10^8}{99 \times 10^6}=3.03\ m$$

Therefore, the wavelength of the radio signal broadcast at a frequency of 99.0 MHz is 3.03 meters.