Sound Intensity The relationship between the number of decibels β and the intensity of a sound I (in watts per square meter) is β = 10 l o g I 10 − 12 Find the intensity I for each decibel level β . (a) β = 60 (b) β = 135 (c) β = 1
Sound Intensity The relationship between the number of decibels β and the intensity of a sound I (in watts per square meter) is β = 10 l o g I 10 − 12 Find the intensity I for each decibel level β . (a) β = 60 (b) β = 135 (c) β = 1
Solution Summary: The author calculates the intesnsity I for decibel level beta =60 and the intensity of sound I (in watt per square meter).
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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)
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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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