can someone plz help me john played a note on his tuba that vibrated the air 120 times per second if he played the note for 4 seconds how many times did the air vibrate

Okay, from the given word problem we can understand that :-

We are asked to find how many times the air will vibrate if John played a note on his tuba for 4 seconds. For this, we need to multiply the time taken by the note to vibrate in the air per second into 4. That is, we need to calculate ⇨ 120 × 4

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Multiply 120 by 4 to get 480.

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So, the answer is ⇨ The air will vibrate about 480 times if John played a note on his tuba for 4 seconds.

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answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

answer:   c ?

step-by-step explanation: