Answer:
RU = 10.5, QS = 18
Step-by-step explanation:
RT is 21, and RU is half of RT, making it 10.5
SU is 9, and QS is double of SU, making QS 18.
42.5
34:80*100 =
(34*100):80 =
3400:80 = 42.5
D
loudness depends on the amplitude or height of the sound waves
I'm guessing it's 70°
in the image above you can see I circled the 70°
the same angle is below it to the left. which means it's 70°