The correct answer is B. Medium. This is because to travel through the ear, the sound wave must go through the ear drum.
C. when did the earth form? and what is it made of?
The length of an arc rounded to the nearest hundredth is 4.75units
<h3>How to calculate the length of an arc?</h3>
The formula for calculating the length of an arc is expressed as:
L = rtheta
where
r is the radius = AB = 4 units
theta is the central angle = <ABC = 68 degrees
Substitute
L = 4(68π/180)
L = 4.75units
Hence the length of an arc rounded to the nearest hundredth is 4.75units
Learn more on length of an arc here: brainly.com/question/2005046
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