Answer:
The ratio of the new distance to the old distance is (11/2) .
The intensity is inversely proportional to the square of the distance,
so the new intensity will be (2/11)² times the old intensity.
Intensity = 8,000 (2/11)² =
32,000 / 121 = 262.463 units
Rounded to the nearest whole unit: 262 units
Step-by-step explanation:
264 units of intensity came from a distance of 11 miles option (c) 264 units is correct.
It is given that the intensity is 8000 units at a distance of 2 miles.
It is required to find the intensity at a distance of 2 miles.
What is a fraction?Fraction number consists of two parts one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.
The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station.
Suppose the Intensity of the signal is I and the distance is d, then:
[tex]\rm I \propto\frac{1}{d^2}[/tex]
Intensity from the station [tex]\rm I_1=8000 \ units[/tex]
[tex]\rm I_1[/tex] intensity at distance [tex]\rm d_1=2 \ miles[/tex]
Intensity from the station [tex]=\rm I_2[/tex]
[tex]\rm I_1[/tex] intensity at distance [tex]\rm d_2=11 \ miles[/tex]
[tex]\rm \frac{I_2}{I_1} = \frac{d_1^2}{d_2^2}[/tex] (From the proportional relation)
[tex]\rm \frac{I_2}{8000} = \frac{2^2}{11^2}[/tex]
[tex]\rm I_2 =8000\times\frac{4}{121} \\\\\rm I_2 = 264.46 \ units[/tex] ≈ 264 units
Thus, the 264 units of intensity came from a distance of 11 miles.
Learn more about the fraction here:
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if a town with a population of 10,000 doubles in size every 17years wat will population be 68 years from now
Answer:
20,000×17 gives 340,000
340,000×68 which gives 23,120,000
Is the equation y=5x+1 a linear equation? Explain.
Answer:
Yes
Step-by-step explanation:
Linear equations are equations in which the highest power of the equation is always 1, they look like a straight line when put on graph and they usually have this form: y = ax + b
y = 5x + 1 is a good example of a linear equation but they may also look like: y = 2x (b = 0) or y = x + 3 (a = 1).
Please help me with this math problem!! Will give brainliest!! :)
Answer:
See below
Step-by-step explanation:
From the graph :
y = -x -inf < x <=0
y = x 0<= x <= 2
y = 3 x > 2
What is the value of the expression (2^4)^2?
Answer:
256Explanation:
[tex]\dashrightarrow \sf \left(2^4\right)^2[/tex]
apply exponent rule: [tex]\bold{\left(a^b\right)^c=a^{bc}}[/tex]
[tex]\dashrightarrow \sf 2^{4*2}[/tex]
[tex]\dashrightarrow \sf 2^{8}[/tex]
[tex]\dashrightarrow \sf 256[/tex]
[tex]\large{\boxed{(\sf 2^{4})^2 \ \ = \ \ 256}[/tex]
What is the solution to this system of equations?
Those equations in the corner are, y = x -4. y = -0.5x + 8
Answer:
x=8, y=4
(8,4)
Step-by-step explanation:
y = x - 4
y = -0.5x + 8
x - 4 = -0.5x + 8
x = -0.5x + 12
1.5x = 12
15x = 120
x = 8
plug x back into one of the first equations, and you get
y = 4.
(8,4)
Which value is the solution of
[tex] \sqrt[3]{3x} + 7 = 4[/tex]
A.-9
B.-1
C.3
D.19
Answer:
A
Step-by-step explanation:
[tex]\sqrt[3]{3x}[/tex] + 7 = 4 ( subtract 7 from both sides )
[tex]\sqrt[3]{3x}[/tex] = - 3 ( cube both sides to clear the radical )
3x = (- 3)³ = - 27 ( divide both sides by 3 )
x = - 9
Find the length of AB
help
Answer: 9
Step-by-step explanation:
Serena does 10 minutes of endurance exercises. she plans on doing it for s minutes of doing strength exercises. complete the two equations using t, the total number of minutes serena will spend exercising.
The equation that represents the time spent on the exercise by Serena will be t = 10 + s
How to compute the equation?From the information given, it was stated that Serena does 10 minutes of endurance exercises. and that she plans on doing s minutes of strength exercises.
Therefore, the equation that represents the time spent on the exercise will be t = 10 + s
Learn more about equations on:
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A line passes through the point (6, 7) and has a slope of 4.
Write an equation in slope-intercept form for this line.
Answer:
y = 4x - 17
Step-by-step explanation:
we can use the equation y = mx + b
where m is the slope.
now we want to find the value of b.
so
7 = 24 + b
b= -17
so the answer is
y = 4x -17
Aiden invested $43,000 in an account paying an interest rate of 9 1/4 % compounded monthly. Hailey invested $43,000 in an account paying an interest rate of 8 7/8% compounded continuously. To the nearest dollar, how much money would Aiden have in his account when Hailey's money has doubled in value?
first off let's change the mixed fractions to improper fractions, and let's Hailey's account first.
[tex]\stackrel{mixed}{9\frac{1}{4}}\implies \cfrac{9\cdot 4+1}{4}\implies \stackrel{improper}{\cfrac{37}{4}} ~\hfill \stackrel{mixed}{8\frac{7}{8}}\implies \cfrac{8\cdot 8+7}{8}\implies \stackrel{improper}{\cfrac{71}{8}} \\\\[-0.35em] ~\dotfill[/tex]
[tex]~~~~~~ \textit{Continuously Compounding Interest Earned Amount} \\\\ A=Pe^{rt}\qquad \begin{cases} A=\textit{accumulated amount}\dotfill &\stackrel{43000(2)}{\$86000}\\ P=\textit{original amount deposited}\dotfill & \$43000\\ r=rate\to \frac{71}{8}\%\to \frac{~~ \frac{71}{8}~~}{100}\dotfill &0.08875\\ t=years \end{cases} \\\\\\ 86000=43000e^{0.08875\cdot t}\implies \cfrac{86000}{43000}=e^{0.08875t}\implies 2=e^{0.08875t}[/tex]
[tex]\ln(2)=\ln(e^{0.08875t})\implies \log_e(2)=\log_e(e^{0.08875t})\implies \ln(2)=0.08875t \\\\\\ \cfrac{\ln(2)}{0.08875}=t\implies 7.81\approx t[/tex]
ok, now we know how long it takes for Hailey's money to double, how much money does Aiden have by then?
[tex]~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$43000\\ r=rate\to \frac{37}{4}\%\to \frac{~~ \frac{37}{4}~~}{100}\dotfill &0.0925\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{monthly, thus twelve} \end{array}\dotfill &12\\ t=years\dotfill &\frac{\ln(2)}{0.08875} \end{cases}[/tex]
[tex]A=43000\left(1+\frac{0.0925}{12}\right)^{12\cdot \frac{\ln(2)}{0.08875}}\implies A=43000\left( \frac{4837}{4800} \right)^{\frac{12\ln(2)}{0.08875}}\implies \boxed{A\approx 88311}[/tex]
notice, in Hailey's amount we used the logarithmic value for "t", just to avoid any rounding issues.
The sum of consecutive positive integers is 93.find number
find Y thanks don’t be guessing cuz girl
Answer:
3 inches
Step-by-step explanation:
It's like 2 inches, but a little bigger.
Hope this helps and is correct.
Btw it's my birthday.
What is the least whole number n such that 84 divides n! ?
Answer:
5 should be the correct answer
Use the equation n2 n = 56 to determine which figure has 56 blocks. figure has 56 blocks.
The factor of the quadratic equation n² + n = 56 is (n + 8)(n - 7). Then the value of the n is 7 and negative 8.
What is a factorization?It is the method to separate the polynomial into parts and the parts will be in multiplication. And the value of the polynomial at this point will be zero.
The quadratic equation will be given below.
n² + n = 56
The equation can be written as
n² + n - 56 = 0
On factorization, we have
n² + n - 56 = 0
n² + 8n - 7n - 56 = 0
(n + 8)(n - 7) = 0
n = 7, -8
The value of the n is 7 and negative 8.
More about the factorization link is given below.
https://brainly.com/question/6810544
Answer:
Figure 7 has 56 blocks.
Step-by-step explanation:
If f(x)= 4x exponent 3 - 11x , what is the valueof f(5)?
Answer:
445
Step-by-step explanation:
4(5)^3-11(5)
500-55
445
|x+1|+|x-2|=3
can someone give an easy explanation plssss
Answer:
The numbers inside |x| is always positive
Step-by-step explanation:
|x+1| ---> x+1
|x-2| ---> x+2
= 3
Question 8 of 10
Suppose a sample consists of the following data values. What is the sample
mean?
6,7,3,9,2,4,5,9,9,3,7,8
O A7
B. 6
C. 5
Answer:
whatever number is repeating the most is the answer.
Find the volume of the figure below.
Answer:
C) 2808
Step-by-step explanation:
Volume of Triangular Prism = 1/2 x height x length x base
= 1/2 * 9 * 24 * 26
= 2808 mm^3
I hope my answer helps you.
please help me solve this?
Answer:
there are none (sorry if I got it wrong)
Step-by-step explanation:
also, there is none because there other numbers are really close to the other number
outliers are a number that is really small in the pack of numbers and outliers can also be the number that is really big for example I have the numbers 3 24 28 32 43 and then 100. 3 and 100 are outliers because one number (3) is really small from the other numbers are bigger and one number (100) is really big from the other number but sometimes there are no outliers
Chart Rodrigo's total utility for lattes and the marginal utility for the same using information
from the table.
Quantity
Utility
0
14
2
3
4
on ANO
22
28
32
35
5
1)
40
30
Units of Total Utility
20
10
0
1
2
3
4
N
5
Number of Lattés
2)
)
20
15
Units of Total Utility per Latte
10
5
0
1
2
3
4 5
Number of Lattés
The marginal utility is the extra satisfaction derived from the consumption of a product.
How to illustrate the marginal utility?Your information isn't well written. Therefore, an overview of utility will be given. The total utility is the total amount of satisfaction that a consumer derives from a product.
The marginal utility simply means the extra satisfaction that's gotten from a product when an additional unit is consumed.
The formula for marginal utility will be:
= Total utility difference/Quantity of goods difference
Learn more about marginal utility on:
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>>)
What types of angles are in each of these quadrilaterals?
Answer:
all the quadrilaterals have acute angles!
How many solutions does the inequality x>12 have?
Answer:
infinte
Step-by-step explanation:
The answer is anything greater than 12 so it would be infinte
A= 108. Reflex angle b=
180+72=252
Step-by-step explanation:
an angel can be a large or as wide up to 360 then it is a circle
from the center out one way is 180
the same from the center the other way is 180
In an arithmetic sequence, T1=4 and T7=22.
Using Simultaneous equations find the values of a and d.
Answer:
Step-by-step explanation:
t1 means a1 and t7 means a7
a+(n-1)d=an
a+(1-1)d=4
so we get a as 4
a=4
a+(n-1)d=an
4+(7-1)d=22
4+6d=22
6d=22-4
d=18/6
d=3
Can someone help with these questions??
Will be helpful
Match each word to its definition.
Answer:
1. biased sample: sample not representative of the entire population
2.convenience sample: sample where representatives are easily accessible
3.unbiased sample: sample where every member of the population has an equal chance
4. self-selected sample: sample where members volunteer to take part
5. stratified sample: members are selected from the different subgroups within a population
6. systematic sample: sample members are selected through the use of a rule.
Hope this helps!!
1. biased sample: sample not representative of the entire population
2.convenience sample: sample where representatives are easily accessible
3.unbiased sample: sample where every member of the population has an equal chance
4. self-selected sample: sample where members volunteer to take part
5. stratified sample: members are selected from the different subgroups within a population
6. systematic sample: sample members are selected through the use of a rule.
Hope this helps!!
Solve the quadratic equation by using a numeric approach.
0.02x squared + 0.1 x - 2 = 0
a.
x = 2.3 and x = -29.2
c.
x = 5.6 and x = -12.2
b.
x = 7.8 and x = -12.8
d.
x = 1.3 and x = -22.6
Answer:
The option b) is correct (x = 7.8 and x = -12.8)
For the verification picture is below
I hope my answer helps you.
help pls
just say what option
Answer:
D .the formation in the graph shows a positive non linear correlation, the weight of the dinosaur trends to increase according to its length.hope this helps you :)The information on the graph shows a positive nonlinear correlation and the weight of the dinosaur tends to increase according to its length.
What is a discrete graph?A discrete graph is also known as a scatter plot that shows the discontinuous and the nonlinear data point on the graph.
From the graph, we can see the increasing weight of the Dinosaur size vertical y-axis and the increasing length of the feet on the horizontal x-axis.
Therefore, we can conclude that the data points show an increasing nonlinear weight on the graph as the length increases.
Learn more about discrete graphs here:
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#SPJ5
x= degrees 32° x x
Answer:
32 +x+x=180(Sum of angles of a triangle)
32+2x=180
2x=180-32
2x=148
x=148/2
Therefore,X=74
Answer:
the answer for x is 74°
Step-by-step explanation:
[tex]32 + x + x = 180 \\ 2x + 32 = 180 \\ 2x = 180 - 32 \\ 2x = 148 \\ x = 74 \: degrees[/tex]
3) You need to paint shutters on a window that is on the second floor of your house. You have a 20 foot ladder that you will use. There is a warning on the ladder that states the angle formed by the ladder and the ground must not be less than 70 degrees, or the ladder may slip and cause serious injury or death. You planned on placing the bottom of the ladder 3 feet from the base of the house. Will the angle formed between the ground and the ladder be safe? What is the furthest possible distance the ladder can be placed to maintain a safe angle? Sketch:
Answer:
See below ↓↓
Step-by-step explanation:
Height of ladder = 20 feetDistance of base of ladder from house = 3 feetAngle must not be < 70°Taking the cos ratio of the angle
Let the angle formed be α cos α = adjacent side / hypotenusecos α = 3 / 20 = 0.15α = cos⁻¹ (0.15)α = 81.37°⇒ The angle formed is safe
Finding furthest possible distance
Take α to be 70°cos 70° = 0.34 = x/20⇒ x = 20 x 0.34 = 6.8 feetAnswer:
Yes, the angle formed between the ground and the ladder is safe
6.84 ft (nearest hundredth)
Step-by-step explanation:
We can use the cos trig ratio to determine the angle made between the 20ft ladder and 3ft from the base of the house (see first attached image for sketch).
[tex]\sf \cos(\theta)=\dfrac{A}{H}[/tex]
where:
[tex]\theta[/tex] is the angleA is the side adjacent to the angleH is the hypotenuseGiven:
A = 3 ftH = 20 ft[tex]\sf \implies \cos(\theta)=\dfrac{3}{20}[/tex]
[tex]\sf \implies \theta=\cos^{-1}\left(\dfrac{3}{20}\right)[/tex]
[tex]\sf \implies \theta=81.37307344..^{\circ}[/tex]
Therefore, as the ladder is forming an 81.37° angle and 81.37...° > 70° the angle formed between the ground and the ladder is safe.
To find the furthest possible distance the ladder can be placed, set [tex]\theta[/tex] to 70° (max safe angle) and the hypotenuse (ladder length) to 20, then solve for A (see second attache image for sketch):
[tex]\sf \implies \cos(70^{\circ})=\dfrac{A}{20}[/tex]
[tex]\sf \implies A=20\cos(70^{\circ})[/tex]
[tex]\sf \implies A=6.840402867...\: \sf ft[/tex]
So the furthest possible distance the ladder can be placed to maintain a safe angle is 6.84 ft (nearest hundredth).