Answer:
The frequencies are 
Explanation:
From the question we are told that
The speed of the wave is 
The length of vibrating clothesline is 
Generally the fundamental frequency is mathematically represented as

=> 
=> 
Now this other frequencies of vibration experience by the clotheslines are know as harmonics and they are obtained by integer multiple of the fundamental frequency
So
The frequencies are mathematically represented as

=> 
Where n = 1, 2, 3 ....
It's number three on your worksheet. ;)
<span>The
atmospheric pressure decreases by 12% for each additional kilometer above sea level=>
Pressure = [Pressure at sea level] * (0.88)^x, where x is the height measured in Km
Pressure = 103 kPa * (0.88)^x
You can see that at sea level x = 0 and Pressure = 103 kPa* (0.88)^0 =103 kPa.
Then, at 5.2 km, x = 5.2 => Pressure = 103 kPa * (0.88)^5.2 = 52.98 kPa
Answer: 53 kPa
</span>