3 CHALLENGE The units kHz and MHz stand for kilohertz and megahertz, respectively. If 1 MHz = 1000 kHz and 1 kHz =
1000 Hz, what is the frequency, in Hz, of a signal broadcast on
99.7 FM? Express your answer in scientific notation.

As seen in a us weather map, the h (or high) and l (or low) symbols indicate regions where surface air pressures are high or low, respectively, compared to surrounding areas. an h is plotted where the air pressure is highest and an l is plotted where the air pressure is lowest. proceeding outward and away from the center of a high pressure system, the air pressure "