Answer:
1. is the age group 35 and 44
2. is 2006 i think its 2006 i cant really tell in the picture but its the one before the last one!
 
        
             
        
        
        
Answer:
D. 4000 km
Explanation:
f = Frequency of wave that is being transmitted = 76 Hz
 = Wavelength of wave that is being transmitted
 = Wavelength of wave that is being transmitted
v = The velocity of electromagnetic waves through air = 
Velocity of a wave is given by

Hence, the approximate wavelength of the waves is 4000 km