Mathematics, 26.08.2021 20:50 hfyyf259

28. The noise level at a music concert must be no more than 80 decibels (dB) at the edge of the property on which the concert is held.
Melissa uses a decibel meter to test whether the noise level at the edge of the property is no more
that 80 dg.
-Melissa is standing 10 feet away from the speakers and the noise level is 100 dB.
-The edge of the property is 70 feet away from the speakers.
-Every time the distance between the speakers and Melissa doubles, the noise level decreases by about 6 dB.
Rafael claims that the noise level at the edge of the property is no more than 80 dB since the edge of the
property is over 4 times the distance from where Melissa is standing. Explain whether Rafael is or is not correct.

Answers: 2

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 20:30

If m∠abc = 70°, what is m∠abd? justify your reasoning. using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°. using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°. using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality. using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Answers: 2

Answer

Mathematics, 21.06.2019 21:30

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?

Answers: 2

Answer

Mathematics, 21.06.2019 22:30

Nicole is making carrot bread she needs 5 cups of carrots for 2 cups of sugar.what is the ratio of cups of sugar to cups of carrots that nicole will need? write the ration in three different ways

Answers: 1

Answer

Mathematics, 21.06.2019 23:30

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis

Answers: 2

Answer

You know the right answer?

28. The noise level at a music concert must be no more than 80 decibels (dB) at the edge of the pr...

Questions