Answer:
3 groups will have 5 members with a class leader, but only one will have 6 members and a class leader
Step-by-step explanation:
The loudness, L, measured in decibels (Db), of a sound intensity, I, measured in watts per square meter, is defined as L = 10 log StartFraction I Over I 0 EndFraction, where I 0 = 10 Superscript negative 12 and is the least intense sound a human ear can hear. Jessica is listening to soft music at a sound intensity level of 10^-9 on her computer while she does her homework. Braylee is completing her homework while listening to very loud music at a sound intensity level of 10^-3 on her headphones. How many times louder is Braylee’s music than Jessica’s?
Answer:
Braylee’s music is 3 times louder than Jessica's
Step-by-step explanation:
Given
[tex]L = 10\log\frac{I}{I_0}[/tex]
[tex]I_0 = 10^{-12}[/tex]
Required
Number of times Braylee's music is louder than Jessica's
First, we calculate the loudness of Jessica's music.
From the question;
[tex]I = 10^{-9}[/tex]
So, we have:
[tex]L = 10\log\frac{I}{I_0}[/tex]
[tex]L = 10\log\frac{10^{-9}}{10^{-12}}[/tex]
Apply law of indices
[tex]L = 10\log{10^{12-9}}[/tex]
[tex]L = 10\log{10^3[/tex]
Apply law of logarithm
[tex]L = 3*10\log{10[/tex]
[tex]\log10 = 1[/tex]
So:
[tex]L_1 = 3*10*1 = 30[/tex]
First, we calculate the loudness of Braylee's music.
From the question;
[tex]I = 10^{-3}[/tex]
So, we have:
[tex]L = 10\log\frac{I}{I_0}[/tex]
[tex]L = 10\log\frac{10^{-3}}{10^{-12}}[/tex]
Apply law of indices
[tex]L = 10\log{10^{12-3}}[/tex]
[tex]L = 10\log{10^9[/tex]
Apply law of logarithm
[tex]L = 9*10\log{10[/tex]
[tex]L_2 = 9*10*1 = 90[/tex]
At this point, we have:
[tex]L_1 = 30[/tex] --- Jessica's
[tex]L_2 = 90[/tex] --- Braylee's
Divide L2 by L1 to get the required number of times
[tex]n = \frac{L_2}{L_1}[/tex]
[tex]n = \frac{90}{30}[/tex]
[tex]n = 3[/tex]
Answer:
D.
Step-by-step explanation:
The following box plot shows the number of years during which 40 schools have participated in an interschool swimming meet:
A box and whisker plot is drawn using a number line from 0 to 10 with primary markings and labels at 0, 5, 10. In between two primary markings are 4 secondary markings. The box extends from 1 to 6 on the number line. There is a vertical line at 3.5. The whiskers end at 0 and 8. Above the plot is written Duration of Participation. Below the plot is written Years.
At least how many schools have participated for more than 1 year and less than 6 years? (5 points)
a
4 schools
b
8 schools
c
10 schools
d
20 schools

Answer:
i dont knowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
Step-by-step explanation:
Will every function have a hole? Why or why not?
Answer:
Step-by-step explanation:
yes
Question 6 (4 points)
(07.06)
There are currently 4 people signed up to play on a baseball team. The team must
have at least 9 players.
Which of the following graphs includes the possible values for the number of people
who still need to sign up for the team? (4 points)
1)
-10-9-8-7-6-5-4-3-2-1 0 1 2 3 4 5 6 7 8 9 10
24H
-10-9-8-7-6-5-4-3-2-1 0 1 2 3 4 5 6 7 8 9 10
NE
OHHH
1 2 3 4 5 6 7 8 9 10
-10-9-8-7-6-5
4) st
-10-9-8-7-6-5-4-3-2-1 0 1 2 3 4 5 6 7 8 9 10
The graph of inequality that represents the scenario is graph (b)
The given parameters are:
People signed up = 4
People needed = At least 9
Represent the number of people who are still needed with x.
So, we have the following inequality expression
[tex]x + 4 \ge 9[/tex]
Subtract 4 from both sides
[tex]x \ge 5[/tex]
The above means that, 5 or more people are still needed
The graph of inequality that represents [tex]x \ge 5[/tex] is graph (b)
Read more about inequalities at:
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Use the long division method to find the result when 6x3 + 10x² + 7x + 2 is
divided by 3x + 2.
Answer:
6x3+10x2+7x+2/3x+2
Step-by-step explanation:
help me and ill give u points (math)
Answer:
64+27=97+X
x =91-97
x=-6
In school, Philip learned that the average person produces 50 pounds of recyclables every month. But, they usually throw away twice that much garbage. He wonders what that means for his family. Philip lives with his mother, father, and 2 sisters. About how many tons of garbage does Philip's family throw away every year?
Answer:
6000 tons
Step-by-step explanation:
dirt thrown by one person = 50 x 2 = 100
there are 5 people in the home
dirt thrown by the family in a month = 100 x 5 = 500
In a year = 500 x 12 = 6000
ILL MARK BRAINLIEST PLEASE HELP!!!
What is the solution to the equation
х
6
12
O x= 1
O x= 2
O x=8
O x= 4
Answer:
B is your answer
Step-by-step explanation:
Hope it is right.
Find the value or measure below. Assume that lines that appear tangent to be tangent.
Answer:
x = 11.2
Step-by-step explanation:
hypotenuse = 8.4 (radius) + 5.6 = 14
using the Pythagorean theorem:
x² = 14² - 8.4² = 196 - 70.56 =125.44
x = √125.44 = 11.2
You start at (0,0). You move up 7 units. Where do you end
Answer:
You end up at (0,7)
Step-by-step explanation:
You are moving upwards in the y-axis of a coordinate plane
A certain triangle, one angle measures ten degrees more than the second angle and ten degrees less than the third angle. What is the measure of the smallest angle?
Answer:
50°
Step-by-step explanation:
Let :
Let the angle = x
Second angle = x + 10
Third angle = x - 10
Sum of angles in a triangle = 180
x + (x + 10) + (x - 10) = 180
x + x + 10 + x - 10 = 180
3x = 180
x = 180 / 3
x = 60
Smallest angle :
x - 10 = 60 - 10 = 50°
Keisha works as a tutor for $13 an hour and as a waitress for $9 an hour. This month, she worked a combined total of 101 hours at her two jobs. Let t be the number of hours Keisha worked as a tutor this month. Write an expression for the combined total dollar amount she earned this month.
Answer:
Keisha got $2,222 that month
Step-by-step explanation:
Answer:
its 2,222
Step-by-step explanation:
i got it right
A student received a coupon for 10% off the total purchase price at the clothing store. Let x be the original price of the purchase. Use the expression below for the new price of the purchase. Write an equivalent expression by combining like terms.
x - 0.1x =
Answer:
All most there. buddy:-)
THIS IS FOR TODAY SOMEONE HELP ME PLS!!!
NO LINKS PLEASE PLEASE
Step-by-step explanation:
Angle M = Angle R
47x - 17 = 32x + 28
15x = 45
x = 3
Angle M = 47(3) - 17 = 124°
Angle R = Angle M = 124°
Angle Q = 180 - Angle M = 56°
Angle N = Angle Q = 56°
If the volume of this cube (15 cm and 5 cm) is 525 cm3,then the length of the missing side is what cm?
help please im horrible at this stuff T-T
Answer:
I dont know for sure but I would have to guess DC because there's no line connecting the 2
Please do answer DC at your own risk though.
Answer:
DC
Step-by-step explanation:
Because there not connected to eachother
Select all the
expressions that are equivalent to 4−3.
Answer:
B,C,D are equivalent to 4^-3
Answer:
B and c and D
Step-by-step explanation:
I think that is the right answer
What is the surface area of this composite figure?
Answer:
Step-by-step explanation:
1. Charles is mixing a 12 ounce can of apple juice
concentrate to make juice. The recipe says:
Mix one can of concentrate with 4 cans of water.
How large a pitcher will she need (answer in ounces)?
A television program asks its viewers to visit a Web site to indicate their preference for two presidential candidates. 76% of the viewers who responded preferred candidate A. In a town of 50,000, how many would you expect to choose candidate A?
Find the surface area of the square pyramid if the slant height is 13 mm.
A. 264 mm
B. 288 mm
C. 335 5 mm
D. 407 mm
Simple Question:
Find the surface area of the square pyramid if the slant height is 13 mm.
Options:
A. 264 mm
B. 288 mm
C. 335 5 mm
D. 407 mm
Answer:
A) 264mm
Step-by-step explanation:
11 x 13 = 143 = 264mm
According to this diagram, what is cos 16°? 25 90° 24 OA OB. 곪 24 7 OC. OD.
Answer:
None of the listed answers are correct.
cos16º = 24/25
Step-by-step explanation:
cos∅ = adj/hyp
adj = 24
hyp = 25
cos 16º = 24/25
in quadrilateral ABCD shown the two diagonals AC and BD intersect at point E
Which of the following statements, along with the given information, is both necessary and sufficient to prove that ABCD is a parallelogram?
A) AC 1 BD
B) AB CE and BE DE
C) AB CD and BS CE
D)m ABC + m/BAD - 180
Answer:
your answer is B AB CE and BE DE
So mark me as brainliest
The statements that are necessary and sufficient to prove that ABCD is a parallelogram are, (B), (C) and (D).
What is a parallelogram?A basic quadrilateral with two sets of parallel sides is known as a parallelogram. In a parallelogram, the opposing or confronting sides are of equal length, and the opposing angles are of equal size.
The area of a parallelogram is base multiples by height as two triangles form a parallelogram.
From the properties of parallelograms the statements that are necessary and sufficient to prove that ABCD is a parallelogram are,
[tex]\overline{AE}[/tex] ≅ [tex]\overline{CE}[/tex] and [tex]\overline{BE}[/tex] ≅ [tex]\overline{DE}[/tex] as diagonal of a parallelogram bisect each other.
[tex]\overline{AB}[/tex] ≅ [tex]\overline{CD}[/tex] and [tex]\overline{BE}[/tex] ≅ [tex]\overline{CE}[/tex] opposite sides of a parallelogram are equal.
m∠ABC + m∠BAD is 180° as the sum of the adjacent sides in a parallelogram are supplementary.
learn more about parallelograms here :
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#SPJ2
hi! please help i’ll give brainliest
Answer:
Third option: Rocks being broken apart
Step-by-step explanation:
Have a good day :)
Answer: rock being broken apart
Step-by-step explanation:
How many feet of fencing is needed to enclose a rectangular garden with a 9 foot long side and a 15 foot long diagonal
Answer:
42 ft
Step-by-step explanation:
To find the unknown side:
[tex]\sqrt{15^2-9^2} =12[/tex]
Total perimeter: 2(12 + 9) = 42 ft
Molly earned $135 for working 5 hours. How much did Molly earn per hour?
Answer:
$27
Step-by-step explanation:
[tex]\frac{135}{5}[/tex]
[tex]=27[/tex]
$27/hour
135 ÷ 5 = 27
Molly earned $27 per hour
5. Identify the function that is even.
And why
Answer:
A
Step-by-step explanation:
easy algebra question below first correct answer gets brainliest
Given:
The right angle triangle with legs 4 units and 7 units.
To find:
The length of hypotenuse.
Solution:
Pythagoras theorem: In a right angle triangle,
[tex]Hypotenuse^2=Base^2+Perpendicular^2[/tex]
Let x be the length of the hypotenuse.
Using the Pythagoras theorem for the given triangle, we get
[tex]x^2=4^2+7^2[/tex]
[tex]x^2=16+49[/tex]
[tex]x^2=65[/tex]
Taking square root on both sides, we get
[tex]x=\sqrt{65}[/tex] [∵Side length cannot be negative]
[tex]x\approx 8.06[/tex]
Therefore, the length of the missing side for the given right angle triangle is 8.06 units.
Find a positive angle less than 2pi that is coterminal with 28pi/9
Answer:
o find a coterminal angle you add or subtract 2pi
-pi/100 + 2pi = -pi/100 + 200pi/100 = 199pi/100
Step-by-step explanation:
R and S represent positive integers on a number line and R
Answer:
D u got it right if thats wrong then its C
Step-by-step explanation:
MRK ME BRAINLIEST PLZZZZZZZZZZZZZZZZZZ
Answer:
The answer is c. I know the rest of the problem, I have done this before. The full question is:R and S represent positive integers on a number line
and R<S. Which of the following could be the
positions of R and S ? Both R and S is on the right of 0, and R is behind S.
Step-by-step explanation: