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liubo4ka [24]
3 years ago
7

A small home speaker produces 0.200 ~\text{W}0.200 W of acoustical power. (This is achieved, for example, by a 10-Watt speaker o

perating at 2% electrical efficiency). If the speaker projects sound uniformly in all directions, what is the loudness of the sound (in dB) at a distance of 0.668 ~\text{m}0.668 m from the speaker?
Mathematics
1 answer:
Anika [276]3 years ago
4 0

Answer:

i dont speak english

Step-by-step explanation:

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3. A quadratic polynomial whose<br>product and the sum of<br>zéroes are -12 and 1​
muminat

Answer:

the equation is : x²-x-12

Step-by-step explanation:

the quadratic equation is in the form of : y=ax²+bx+c

the product of the zeros is -12 and the sum is 1

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y=x²-x-12

check : factorize first (x+3)(x-4)=0

either x+3=0 then x=-3

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the equation is : x²-x-12

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A box contains 17 marbles, 13 blue marbles, and 23 white marbles. What is the part-whole ratio of red marbles in the box.
sergij07 [2.7K]
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6 0
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Question in the photo below
vichka [17]

Answer:

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makvit [3.9K]

Answer:

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Step-by-step explanation:

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we now know it is an isosceles triangle

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side BC = x

BC = 22


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