The formula for measuring sound intensityin decibels D is defined by the equation D = 10 log ( I I 0 ) where I is the intensity of the sound in watts persquare meter and I 0 = 10 − 12 is the lowest level of sound that the average person can hear. How manydecibels are emitted from a rock concert with a sound intensity of 4.7 ⋅ 10 − 1 watts per square meter?
The formula for measuring sound intensityin decibels D is defined by the equation D = 10 log ( I I 0 ) where I is the intensity of the sound in watts persquare meter and I 0 = 10 − 12 is the lowest level of sound that the average person can hear. How manydecibels are emitted from a rock concert with a sound intensity of 4.7 ⋅ 10 − 1 watts per square meter?
The formula for measuring sound intensityin decibels D is defined by the equation
D
=
10
log
(
I
I
0
)
where I is the intensity of the sound in watts persquare meter and
I
0
=
10
−
12
is the lowest level of sound that the average person can hear. How manydecibels are emitted from a rock concert with a sound intensity of
4.7
⋅
10
−
1
watts per square meter?
Students were asked to simplify the expression (secØ - cosØ)/secØ Two students' work is given.Student A: step 1 secØ/secØ - cosØ/secØstep 2 cosØ/1 - (1/cosØ)step 3 1 - cos^2Østep 4 sin^2ØStudent B: step 1 (1/cosØ)-cosØ)/secØstep 2 (1 - cos^2Ø/cosØ)/secØstep 3 sin^2Ø/cos^2Østep 4 tan^2ØPart A: Which student simplified the expression incorrectly? Explain the errors that were made or the formulas that were misused.Part B: Complete the student's solution correctly, beginning with the location of the error.
Although 330° is a special angle on the unit circle, Amar wanted to determine its coordinates using the sum and difference formulas.Part A: Determine cos 330° using the cosine sum identity. Be sure to include all necessary work.Part B: Determine sin 330° using the sine difference identity. Be sure to include all necessary work.
The figure shows the chain drive of a bicycle. How far will
the bicycle move if the pedals are rotated through 180°?
Assume the radius of the bicycle wheel is 13.5 inches.
The bicycle will travel approximately in.
(Round to the nearest tenth.)
mple Get more help
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1.44 in
4.26 in
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Chuck anawe
University Calculus: Early Transcendentals (4th Edition)
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