What might happen if a person’s ear canal was blocked?

A. Sounds would be louder.
B. Sound waves would vibrate longer.
C. Sound waves would travel longer.
D. Sounds would be harder to hear.

D. Sounds would be harder to hear.

Explanation:

if the ear canal is blocked then the sound waves cannot reach the ear drum thus we cannot hear clearly.

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find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2