Answer:
The level in decibels is 100.
Step-by-step explanation:
The intensity level in decibels (β) can be found using the following equation:
[tex] \beta = 10log(\frac{I}{I_{0}}) [/tex]
Where:
I: is the intensity = 10⁻⁶ W/cm²
I₀: is the reference intensity = 10⁻¹² W/m²
First, we need to convert the unit of the given intensity from W/cm² to W/m².
[tex] I = 10^{-6} \frac{W}{cm^{2}}*\frac{(100 cm)^{2}}{1 m^{2}} = 10^{-2} W/m^{2} [/tex]
Hence, the level in decibels is:
[tex] \beta = 10log(\frac{10 ^{-2} W/m^{2}}{10^{-12} W/m^{2}}) = 100 dB [/tex]
Therefore, the level in decibels is 100.
I hope it helps you!
8. IS AABC a right triangle? Explain.
Answer:
yes.
traingle ABC is a right angled triangle because angle BÁC is a right angle.
___ is the branch of mathematics that uses alphabetic symbols to represent unknown numbers or specific sets of numbers in order to make generalizations about arithmetic operations and mathematical relationships.
Answer:
I believe it's Algebra because it contains variables and equations where you have to do what you just described in your question.
Hope I helped, have a nice day :)
What is the value of X? (giving brainliest and thanks to all!)
Answer:
I believe it is A
Step-by-step explanation:
I dont quite remember the formula, but I belive that 30 would be correct because if im remembering correctly the formulas are "a + b = c" and "c - (a/b) = (a/b)
a/b = a or b, depending what they give you
Answer:
45°
Step-by-step explanation:
This is a isosceles triangle and also a right triangle, so it means it have an 90° ingernal angle and the other two internal angles have the same value. Remember that the sum of the internal angles of a triangle is always 180°, so:
180° -90° = 90°
90°/2 = 45°
What is the value of x? (giving brainliest and thanks to all!)
Answer:
x° = 64°
Explaination:
This is a right angled triangle so one of the angle is 90°.
So, x° + 90° = 154° (Exterior angle property)
x° = 154° - 90° = 64°
Therefore x° = 64°
Jasper's lawn is 3/4 of an acre in size. The fertilizer bag states that 5 1/2 bags are required for 1 acre. How many bags does Jasper need to fertilize his lawn?
Answer: [tex]4\dfrac{1}{8}\ \text{bags}[/tex]
Step-by-step explanation:
Given
Jasper lawn is three-fourth of an acre
1 acre of land requires [tex]5\frac{1}{2}[/tex] bags
convert mixed numeral to fraction
[tex]\Rightarrow 5\dfrac{1}{2}=\dfrac{11}{2}[/tex]
[tex]\therefore 1\ \text{acre}\equiv\dfrac{11}{2}\ \text{bags}\\\\\Rightarrow \dfrac{3}{4}\ \text{acre}\equiv \dfrac{11}{2}\times \dfrac{3}{4}=\dfrac{33}{8}\ \text{bags}[/tex]
[tex]\Rightarrow \dfrac{33}{8}\ \text{bags}=4\dfrac{1}{8}\ \text{bags}[/tex]
Help I dont understand the subject I need to turn this in by tommorow
Answer:
Actually,I don't understand the que but I will try.
Step-by-step explanation:
Supplementry it means the pair of angle that sum if 180° similarly, complimentry angle sum is 90°
Answer:
A: Complementary, Missing angle -29
E: Complementary, Missing angle -39
J: Complementary, Missing angle - 52
last one: Complementary, Missing angle -66
Hope this helps!
Evaluate the expression 3^4÷ (14 − 5) × 2.
Can you help me plz thank you :)
Hey there!
[tex]\mathsf{\dfrac{3^4}{14-5}\times2}[/tex]
[tex]\mathsf{3^4}[/tex]
[tex]\mathsf{= 3 \times 3 \times3 \times3}[/tex]
[tex]\mathsf {= 9\times9}[/tex]
[tex]\mathsf{= \bf 81}[/tex]
[tex]\mathsf{14 - 5}[/tex]
[tex]\mathsf{= \bf 9}[/tex]
[tex]\mathsf{\dfrac{81}{9}\times2}[/tex]
[tex]\mathsf{\dfrac{18}{9}}\\\\\mathsf{= 81\div9}[/tex]
[tex]\mathsf{\bf = 9}[/tex]
[tex]\mathsf{9\times2}[/tex]
[tex]\mathsf{= \bf 18}[/tex]
[tex]\boxed{\boxed{\huge\textsf{Answer: \bf18}}}\huge\checkmark[/tex]
[tex]\large\textsf{Good luck on your assignment and enjoy day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
Cho hàm Bool 4 biến x, y, z, t với: f -1 (1) = {1010, 1110, 0110, 0010, 1011, 0111, 0011, 1001, 1101, 0001, 1000, 1100, 0100, 0000
nick is making bread dough.
- the recipe requires 3/4 cup of flour and 1 1/8 teaspoons of salt.
- nick wants to make the recipe using 1 cup of flour.
To maintain the ratio how much salt is required when 1 cup of flour is used?
A) 37/32
B) 2/3
C) 1 1/2
D) 1 7/8
What is the area of the triangle?
12
8
Answer:
48
Step-by-step explanation:
Answer:
48 un²
Step-by-step explanation:
1/2 ( base x height)
1/2( 12 x 8 )
1/2( 96 )
48
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
Solve the equation -6 = -9 – 3x for x.
Use the law of sines to find the length of side c.
46.7
C
48°
44
B
c
A. 60.26
B. 44.93
C. 43.09
O D. 44
Answer: It's B. 44.93
Step-by-step explanation:
I figured it out the hard way so you don't have to
Answer:
C.44.93
Step-by-step explanation:
I learned about it in math.
This is duo at 9:00 PLEASE HELP Please Reflect (3,-2) over the y-axis?
Answer:
-3,2 is the answer
Step-by-step explanation:
hope you like it
your answers. At
of the activity, write a
brief evaluation of your work.
Activity
A pom-pom manufacturer makes each of its pom-poms with 35% white strands (W), 25% blue strands (b), and 40% red strands (7). If each pom-
pom has a total of 80 strands, how many of strands of each color are needed to make a pair of pom-poms? In this activity, you'll work through this
pom-pom problem step by step.
Answer:
28 white strands 20 blue strands and 32 Red strands
1/2x = -9 what to do help
Answer:
1
2
=
−
9
\frac{1}{2}x=-9
21x=−9
1
2
=
−
9
Answer:
Step-by-step explanation:
I'm assuming that you are solving for x, since there's nothing else you can do with this mathematically.
[tex]\frac{1}{2}x=-9[/tex] and the goal is to get the x all alone. So we have to lose the fraction. Do that by multiplying by the reciprocal of 1/2 which is 2/1 (a reciprocal is just a fraction flipped upside down). BUT...because this is an equation, what you do to the left side has to be done to the right side too. Like this:
[tex](\frac{2}{1})\frac{1}{2}x=\frac{-9}{1}(\frac{2}{1})[/tex]
On the left, everything cancels out but the x (which is why we do this), and on the right we multiply straight across the top and straight across the bottom to get
[tex]x=\frac{-18}{1}[/tex] which is
x = -18
Simplify. (-18x^3 +17x+6)÷(3x+2)
Answer:
-6x^2 +4x+3
Step-by-step explanation:
See image below:)
How many negative integers are there
between -5 and 2?
A 6
C 4
B 5
D 3
Answer:
There are 4 negative integers between -5 and 2
A baseball is thrown into the air from the top of a 224-foot tall building. The baseball's approximate height over time can be represented by the quadratic equation h(t) = -16t2 + 80t + 224, where t represents the time in seconds that the baseball has been in the air and h(t) represents the baseball's height in feet. When factored, this equation is h(t) = -16(t - 7)(t + 2).
What is a reasonable time for it to take the baseball to land on the ground?
A.
5 seconds
B.
9 seconds
C.
2 seconds
D.
7 seconds
Answer:
D. 7s
Step-by-step explanation:
h(t) = height off the ground
We know the height of the ball at the point when it hits the ground will be 0, so we set h(t) = 0:
h(t) = -16(t - 7)(t + 2) = 0
In order for this to be true, either:
"t - 7 = 0" or "t + 2 = 0"
We can solve these to get the times at which the ball will hit the ground, which gives:
t = 7 or t = -2
-2s is not a logical time because the ball can't hit the ground before it is thrown so this solution is not relevant;
7s therefore is the correct solution
Situation: Find the substance's half-life, in days. Round your answer to the nearest tenth. A 33 gram sample of a substance that's used for drug research has a k-value of 0.1081. Enter the correct answer. N = Noe DONE No = initial mass (at time t = 0) 000 OO N = mass at time t k= = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days
Answer:
1051 or..
10.51
Step-by-step explanation:
Since 33=30 and 0.1081 is supposed to be as a percentage since its already a decimal you could just round it and make it into a fraction then once you get the answer to the fraction it would either be 1081 since 0.1081 as a fraction is 1081/10000 or you could make into 10.81 as a decimal but after that you subtract "30 - 1,081" or 10.81 -30" either one of them and each of those numbers would give you the same exact number. Answer: 1051 or as a decimal 10.51
Answer:
The correct answer 6.4 on PLATO edmentum
Step-by-step explanation:
I did the test
I need help with this one
Answer:
9
Step-by-step explanation:
93808.57316 rounded to the nearest ten thousand is 90000
Answer:
9
Step-by-step explanation:
Jay volunteers at a food bank he volunteered 2 5/6 hours on Saturday 2 1/3 hours on Wednesday how many hours did he volunteered in all
Answer:
5 1/6 hours
Step-by-step explanation:
Add the hours he volunteers
2 5/6 + 2 1/3
Get a common denominator of 6
2 5/6 + 2 1/3*2/2
2 5/6 + 2 2/6
4 7/6
This is an improper fraction
4 6/6 + 1/6
5 1/6
what are the intercepts of the line y=−2x−21
Answer:
-21
Step-by-step explanation:
the formula is y=mx+b
m is the slope and b is the y-intercept
here, for the y value, there's -21 so the y-intercept is -21
hope this helps
given m is parallel to n, find the value of x and y
Which long division problem can be used to prove the formula for factoring the difference of two perfect cubes?
Answer:
The answer would be D
Step-by-step explanation:
Got it right on Edge 2021
(a-b)^2 = hihihihihi
Answer:
[tex] {a}^{2} - 2ab + {b}^{2} [/tex]
Step-by-step explanation:
too easy:)
Answer:
a^2 - 2ab + b^2
Step-by-step explanation:
(a-b)^2
(a-b)*(a-b)
(a*a)
(a*-b)
(-b*a)
(-b*-b)
a^2-ba-ba+b^2
a^2-2ba+b^2
34°
Which expression is equivalent to sin (34º)?
A. cos (349)
B. tan (34°)
C. cos (569)
D. tan (569)
volume of cylinder with a base radius of 5 and height of 3
Answer:
235.5.
Step-by-step explanation:
VOLUME: THE AMOUNT OF SPACE OCCUPIED BY A 3D OBJECT.
The formula for volume of a cylinder is:
[tex]pi*r^2*h (3.14 * radius *radius * height)[/tex]
The radius of this cylinder is 5 and the height is 3.
Now, we can plug the numbers in the formula.
SOLVE:
[tex]pi *5^2*3(3.14*5*5*3)=235.5.[/tex]
The product of the equation is 235.5.
I, therefore, believe the volume of this cylinder is 235.5.
Using the side lengths, determine whether the triangle is acute, obtuse, or right
Side A:4
Side B:8
Side C:5
Answer:
Obtuse
I believe it will be obtuse because the side lengths would take up the shape of something like this, depending on how you put it:
CDE is reflected over the x axis . what are the vertices of c'd'e
please help!! <3
Answer:
last option is correct
Step-by-step explanation:
use formula of reflection over x axis .
The coordinates of C , D , E are (-8 , -1) , (-6 , -5) , (-2 , -4) respectively.
formula :
(x , y) = (x -y)
C(-8 , -1) = C'(-8 , 1)
D(-6 , -5) = D'(-6 , 5)
E(-2 , -4) = E'(-2 , 4)
Answer: Choice D (aka 4th option)
C ' (-8, 1)
D ' (-6, 5)
E ' (-2, 4)
===========================================================
Explanation:
The x axis reflection rule is [tex](x,y) \to (x,-y)[/tex]
x stays the same while y flips in sign (positive to negative, or vice versa).
A point like C(-8, -1) will reflect to C ' (-8, 1)The point D(-6, -5) reflects to D ' (-6, 5)Lastly, the point E(-2, -4) reflects to E ' (-2, 4)All of this points to Choice D as the final answer.
Line segment AB is on the coordinate plane and has endpoints at A(-5,3) and B(1,8). What is the length of the line segment to the nearest hundredth?
A) 30.5 B) 11.0 C) 7.81 D) 3.32
Answer:
C) 7.81
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
Coordinates (x, y)Algebra II
Distance Formula: [tex]\displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]Step-by-step explanation:
Step 1: Define
Identify
Point A(-5, 3)
Point B(1, 8)
Step 2: Find distance d
Simply plug in the 2 coordinates into the distance formula to find distance d
Substitute in points [Distance Formula]: [tex]\displaystyle d = \sqrt{(1--5)^2+(8-3)^2}[/tex][√Radical] (Parenthesis) Subtract: [tex]\displaystyle d = \sqrt{(6)^2+(5)^2}[/tex][√Radical] Evaluate exponents: [tex]\displaystyle d = \sqrt{36+25}[/tex][√Radical] Add: [tex]\displaystyle d = \sqrt{61}[/tex][√Radical] Evaluate: [tex]\displaystyle d = 7.81025[/tex]Round: [tex]\displaystyle d \approx 7.81[/tex]Answer:
AB = 7.81
Step-by-step explanation:
Distance between 2 points = sqrt( (x2 - x1)^2 + (y2 - y1)^) )
x2 = - 5
x1 = 1
y2 = 3
y1 = 8
D = sqrt( -5 - 1)^2 + (3 - 8)^2 )
D = sqrt( (-6)^2 + (-5)^2 )
D = sqrt( (36 + 25)
D = sqrt( 61)
D = 7.81
