Select the correct answers from the drop down menu. The formula ? =10log(I/Ia) is used to find the sound level, ?, in decibels (
dB), of a sound with an intensity of I, In the formula, I0 represents the smallest sound intensity that can be heard by the human ear (approximately 10-12 watts/meter^2). The sound level on a busy street is 70 dB. What is the sound intensity on the street?
The sound intensity on the busy street is __ watts/meter^2.
a. 10^-5
b.10^-10
c.10^-1
The sound intensity on the busy street is __ watts/meter^2.
a. 10^-5
b.10^-10
c.10^-1
2 answers:
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See the picture attached to better understand the problem
we know that
A quadrilateral is called Cyclic quadrilateral <span>if its all vertices lie on the circle.
</span><span>The opposite angles of a Cyclic - quadrilateral are supplementary
</span>so
∠A+∠C=180°
and
∠B+∠D=180°
therefore
the answer is
<span>C) The sum measure of ∠B and ∠D equals 180°</span>
we know that
A quadrilateral is called Cyclic quadrilateral <span>if its all vertices lie on the circle.
</span><span>The opposite angles of a Cyclic - quadrilateral are supplementary
</span>so
∠A+∠C=180°
and
∠B+∠D=180°
therefore
the answer is
<span>C) The sum measure of ∠B and ∠D equals 180°</span>