The formula for measuring sound intensity indecibels D is defined by the equation D = 10 log ( I I 0 ) , where I is the intensity of the sound in wattsper square meter and I 0 = 10 − 12 is the lowest level ofsound that the average person can hear. How manydecibels are emitted from a largeorchestra with asound intensity of 6.3 ⋅ 10 − 3 watts per square meter?
The formula for measuring sound intensity indecibels D is defined by the equation D = 10 log ( I I 0 ) , where I is the intensity of the sound in wattsper square meter and I 0 = 10 − 12 is the lowest level ofsound that the average person can hear. How manydecibels are emitted from a largeorchestra with asound intensity of 6.3 ⋅ 10 − 3 watts per square meter?
The formula for measuring sound intensity indecibels D is defined by the equation
D
=
10
log
(
I
I
0
)
,
where I is the intensity of the sound in wattsper square meter and
I
0
=
10
−
12
is the lowest level ofsound that the average person can hear. How manydecibels are emitted from a largeorchestra with asound intensity of
6.3
⋅
10
−
3
watts per square meter?
Listen
A falling object travels a distance given by the formula d = 6t + 9t2 where d is in feet
and t is the time in seconds. How many seconds will it take for the object to travel
112 feet? Round answer to 2 decimal places. (Write the number, not the units).
Your Answer:
Solve by the quadratic formula or completing the square to obtain exact solutions.
2
e
104
OA) -16±3√6
B) 8±√10
O c) -8±√10
OD) 8±3√√6
U
Question 14 (1 point)
Listen
The frame on a picture is 18 in by 22 in outside and is of uniform width. Using
algebraic methods, what is the width of the frame if the inner area of the picture
shown is 250 in²2? Write answer to 2 decimal places. (Write the number with no
units).
18 in
Your Answer:
22 in
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