Answer:
complementary is 90 degrees
Step-by-step explanation:
supplementary is 180 degrees
Simplify open parentheses x to the two fifths power close parentheses to the 3 sevenths power.
Answer:
x^(6/35)
Step-by-step explanation:
The applicable rule of exponents is ...
(a^b)^c = a^(bc)
__
[tex](x^{\frac{2}{5}})^{\frac{3}{7}}=x^{\frac{2\cdot 3}{5\cdot 7}}=\boxed{x^{\frac{6}{35}}=\sqrt[35]{x^6}}[/tex]
confidence interval of months to months has been found for the mean duration of imprisonment, , of political prisoners of a certain country with chronic PTSD.a. Determine the margin of error, E.b. Explain the meaning of E in this context in terms of the accuracy of the estimate.c. Find the sample size required to have a margin of error of months and a % confidence level. (Use months.)d. Find a % confidence interval for the mean duration of imprisonment, , if a sample of the size determined in part (c) has a mean of months.
Complete Question
A 95% confidence interval of 19.3 months to 47.5 months has been found for the mean duration of? imprisonment, ??,of political prisoners of a certain country with chronic PTSD.
a. Determine the margin of error, E.
b. Explain the meaning of E in this context in terms of the accuracy of the estimate.
c. Find the sample size required to have a margin of error of 13 months and a 99% confidence level.? (Use 38 months. for standard deviation )
d. Find a 99% confidence interval for the mean duration of? imprisonment, ??, if a sample of the size determined in part? (c) has a mean of 36.5 months.
Answer:
a
[tex]E = 14.1 [/tex]
b
In this context E tell us that the true mean will lie within E = 14.1 of the sample mean
c
[tex]n =57 [/tex]
d
[tex] 23.514 < \mu < 49.486[/tex]
Step-by-step explanation:
Considering question a
From the question we are told that
The upper limit is U = 47.5 months
The lower limit is L = 19.3 months
Generally the margin of error is mathematically represented as
[tex]E = \frac{U - L }{2}[/tex]
=> [tex]E = \frac{ 47.5 - 19.3 }{2}[/tex]
=> [tex]E = 14.1 [/tex]
Considering question b
In this context E tell us that the true mean will lie within E = 14.1 of the sample mean
Considering question c
Generally the sample size is mathematically represented as
[tex]n = [ \frac{ Z_{\frac{\alpha }{2} * \sigma }}{ E} ]^2[/tex]
Here E is given as E = 13
Given that the confidence level is 99% then the level of significance is
[tex]\alpha = (100 - 99 )\%[/tex]
=> [tex]\alpha = 0.01 [/tex]
From the normal distribution table the critical value of [tex]\frac{\alpha }{2}[/tex] is
[tex]Z_{\frac{\alpha }{2} } = Z_{\frac{0.01 }{2} } = 2.58[/tex]
So
[tex] n = [ \frac{2.58 * 38}{13}]^2[/tex]
=> [tex]n =57 [/tex]
Considering question d
From the question
The sample mean is [tex]\= x = 36.5[/tex]
Generally the margin of error is mathematically represented as
[tex]E = Z_{\frac{\alpha }{2} } * \frac{\sigma }{n}[/tex]
=> [tex]E = 2.58 * \frac{38 }{57}[/tex]
=> [tex]E = 12.986 [/tex]
Generally the 99% confidence interval for mean distribution is mathematically represented as
[tex] 36.5 - 12.986 < \mu < 36.5 + 12.986[/tex]
=> [tex] 23.514 < \mu < 49.486[/tex]
|3x-7| + 7 = 9 What is the first solution?
Plzzz help
Answer:
3 and 5/3Step-by-step explanation:
Solving in steps:
|3x-7| + 7 = 9|3x-7| = 21. If 3x - 7 > 0
3x - 7 = 23x = 9x = 32. If 3x - 7 < 0
3x - 7 = -23x = 5x = 5/3The total cost for 5 lb of chicken is $26.25. What is the cost of 1 lb of chicken?
Answer:
$5.25
Step-by-step explanation:
$26.25 divided by 5 is $5.25
Answer:
$5.25 for 1 lb of chicken
Step-by-step explanation:
How did I get $5.25?? 26.25 / 5 = 5.25
1 * 5.25 = $5.25
2 * 5.25 = $10.50
3 * 5.25 = $15.75
4 * 5.25 = $21
5 * 5.25 = $26.25
What is 3945 in expanded form?
Answer:
3000 + 900 + 40 + 5
Step-by-step explanation:
(3 x 1000) + (9 x 100) + (4 x10) + (5 x 1) = 3000 + 900 + 40 + 5
Solve for the value of m.
(5m+3)
(8m-4)
Answer:
M=7
Step-by-step explanation:
Angles on a line =180
Middle Angel =90 degrees
5m+3+8m-4+90=180
5m+8m+3-4+90=180
13m-1+90=180
13m+89=180
13m=180-89
13m=91
13m÷13=91÷13
M=7
If I was of help plz mark my answer as brainliest
What is the prime factorization of 150?
2x3 x 5
2*3*52
22 x 3 x 5
2x32x5
Answer:
2*3*5^2
Step-by-step explanation:
1. The first year you obtain your Professional Engineer seal, you design and observe construction of small dams, each of which is in a different area of the country. Each of these dams is designed to pass the 200-year storm without overtopping, since they are relatively small and no loss of life or damage to property is likely if they do fail. After that first year, you never design another dam for the rest of your career since you move into management. a. What is the probability that the very first dam you designed will overtop during your anticipated 45-year career
Answer:
The probability that the very first dam you designed will overtop during your anticipated 45-year career is 0.7985.
Step-by-step explanation:
The question is related to the reliability function.
The reliability of the dam built follows an Exponential distribution with mean time between failure as 200 years.
Then the parameter of the exponential distribution will be:
[tex]\lambda=\frac{1}{200}=0.005[/tex]
The reliability function for the time in which the dam will overtop is given by:
[tex]R(t)=e^{-\lambda t}[/tex]
Compute the probability that the very first dam you designed will overtop during your anticipated 45-year career as follows:
[tex]R(t)=e^{-\lambda t}[/tex]
[tex]R(45)=e^{-0.005\times 45}[/tex]
[tex]=e^{-0.225}\\=0.7985[/tex]
Thus, the probability that the very first dam you designed will overtop during your anticipated 45-year career is 0.7985.
Urgent
ALMN is reflected about the line y = 3.
Answer:
B
Step-by-step explanation:
When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is transformed into its opposite (its sign is changed). ... the line y = x is the point (y, x). The reflection of the point (x,y) across. the line y = -x is the point (-y, -x).
Factor out the GCF of (2x+1)
Answer:
Step-by-step explanation:
The greatest common factor, or GCF, is the greatest factor that divides two numbers. To find the GCF of two numbers: List the prime factors of each number. Multiply those factors both numbers have in common.
f (x) = 3x^2+ 2x
Find f (-4)
Answer:
I think it is 40
Step-by-step explanation:
Need help with this please
Answer:
Bottom right or DStep-by-step explanation:
y - 1 ≤ 4xy + x> -4y ≤ 1/3xCorrect option is the bottom right or D
358 divided by 52
A- 5 r36
B- 6 r46
C- 6 r 40?
D- 6 r 36
Answer:
B
Step-by-step explanation:
u just do the long division <3
Which set of parametric equations over the interval 0 ≤ t ≤ 1 defines a line segment with initial point (–5, 3) and terminal point (1, –6)?
x(t) = –5 + t; y(t) = 3 – 6t
x(t) = –5 + 3t; y(t) = 1 – 6t
x(t) = –5 + 6t; y(t) = 3 – 9t
x(t) = –5 + 8t; y(t) = 1 – 7t
Given:
A line segment with initial point (–5, 3) and terminal point (1, –6).
To find:
The set of parametric equations over the interval 0 ≤ t ≤ 1 which defines the given line segment.
Solution:
Initial point is (–5, 3). So,
[tex]x(0)=-5,y(0)=3[/tex]
Terminal point is (1, –6).
[tex]x(1)=1,y(1)=-6[/tex]
Check which of the given set of parametric equations satisfy [tex]x(0)=-5,y(0)=3,x(1)=1,y(1)=-6[/tex].
Put t=1 in each set of parametric equations.
In option A,
[tex]y(1)=3-6(1)=3-6=-3\neq -6[/tex]
So, option A is incorrect.
In option B,
[tex]y(1)=1-6(1)=1-6=-5\neq -6[/tex]
So, option B is incorrect.
In option C,
[tex]y(1)=3-9(1)=3-9=-6[/tex]
[tex]x(1)=-5+6(1)=-5+6=1[/tex]
Put t=0, in this set of parametric equations.
[tex]x(0)=-5+6(0)=-5[/tex]
[tex]y(0)=3-9(0)=3[/tex]
So, option C is correct.
In option D,
[tex]y(1)=1-7(1)=1-7=-3\neq -6[/tex]
[tex]x(1)=-5+8(1)=-5+8=3\neq 1[/tex]
So, option D is incorrect.
The scores on a mathematics exam have a mean of 70 and a standard deviation of 5. Find the x-value that corresponds to the z-score 2.33. Give the exact answer.
Given:
Mean (μ) = 70
Standard deviation (σ) = 5
z-score = 2.33
To find:
The X-value.
Solution:
We know that,
[tex]z=\dfrac{X-\mu}{\sigma}[/tex]
On substituting the values, we get
[tex]2.33=\dfrac{X-70}{5}[/tex]
Multiply both sides by 5.
[tex]2.33\times 5=X-70[/tex]
[tex]11.65=X-70[/tex]
Add 70 on both sides.
[tex]11.65+70=X[/tex]
[tex]81.65=X[/tex]
Therefore, the required X-value is 81.65.
Answer:
x value is 81.65.
Step-by-step explanation:
Given:
Mean = 70Standard deviation = 5z score = 2.33Using the z-score formula:
z = (x - mean) / SD
Plug the values:
[tex]2.33=\frac{x-70}{5}\\x=5\left(2.33\right)+70\\x=81.65[/tex]
Find out more information about the z-score here: https://brainly.com/question/17436641
Explain why sin (-pi) equals -1 not 1
Which is the equation of the line that passes through the point (2, -2) and has a slope
of 3?
y= 223 +2
y = 2x + 3
y = 3x - 8
y = 3x - 2
Answer:
The answer is
y = 3x - 8Step-by-step explanation:
To find an equation of a line when given the slope and a point we use the formula
[tex]y - y_1 = m(x - x_1) \\ [/tex]
where
m is the slope
( x1 , y1) is the point
From the question the point is (2, -2) and slope is 3
The equation is
[tex]y + 2 = 3(x - 2) \\ y + 2 = 3x - 6 \\ y = 3x - 6 - 2[/tex]
We have the final answer as
y = 3x - 8Hope this helps you
Need help with this.
Answer:
-5/2(3x+4)<6-3x (multiply with -5/2)
-15/2x-10<6-3x (multiply with 2)
-15x-20<12-6x (change sides)
-15x+6x<12+20
-9x<12+20
-9x<32
x>-32/9
Hope this will help u :)
Please help! I’ll mark you as brainliest if correct
Answer:
I think the answer is 0.8 but not sure
8 × 1 + 5 × ( 1/100) + 9 ×( 1/1000) = 8.059?? did I do this correctly???
Answer:
Yes you did it correctly
Step-by-step explanation:
the answer is
[tex]8.059[/tex]
Answer:
Hello! :) i hope I’m correct!!
Step-by-step explanation:
Yes, you have done it correctly.
The answer should be 8.059 or 8059/1000
So, your absolutely correct!!
Hope this helps!
By: BrainlyAnime ^-^
Gas costs $3.05 a gallon, and your car travels at 27 miles for each gallon of gas. How far
can you travel in your car with $95 in your pocket?
A: 7800
B: 11 miles
C: 870 miles
D: 840
We can travel approximately 840 miles with $95.
The correct answer is option (D) 840 miles
What is ratio?"It is a quotient of two mathematical expressions."
What is proportion?"It is a mathematical expression where two ratios are equal."
For given example,
the gas costs $3.05 a gallon.
This means, 1 gallon gas = $3.05
We need to find the distance, we can travel in a car with $95 in pocket.
Let 'm' gallon gas costs $95
The ratio of amount of gas to the price must be proportion.
So, [tex]\frac{1}{3.05} = \frac{m}{95}[/tex]
⇒ 95 = 3.05 m
⇒ m = 95/3.05
⇒ m = 31.14 gallon
Since, car travels at 27 miles for each gallon of gas.
Let car travels 'x' miles for 31.15 gallon of gas.
The ratio of amount of gas to the distance traveled by car must be proportion.
⇒ [tex]\frac{27}{1} = \frac{x}{31.14}[/tex]
⇒ 27 × 31.14 = x
⇒ x = 840.7
⇒x ≈ 840 miles
Therefore, we can travel approximately 840 miles with $95.
The correct answer is option (D) 840 miles
Read more about ratio and proportion here:
https://brainly.com/question/26974513
#SPJ2
Cecilia made four withdrawals of $25 from his checking account. He also gave out five checks for
$100 each. By how much did the amount in his checking account change? Explain using 2-3
sentences how you arrived at your answer.
Answer:
Step-by-step explanation:
$25 times the amount of the withdraw(4) is $100
he gave 5 checks for $100 each = 5 x 100 = $500
$100 + $500 = $600 , Cecilla checking acount change by $600
Most breeding birds in the northeast US migrate elsewhere during the winter. The number of bird species on an Ohio preserve oscillates between a high of 30 in June, and a low of 10 in December. Find a formula for the number of bird species B as a function of t months since January.
i) amplitude
ii) period
iii) Average value
iv) Horizontal shift
Answer:
The answer is below
Step-by-step explanation:
The function B can be represented by the function:
B = C + Acos(Pt)
a) From the graph of the function, it starts from 30, hence it is a cosine function.
The amplitude (A) = (highest value - lowest value) / 2 = (30 - 10) / 2 = 10
A = 10
b) The function completes an oscillation every 12 months, hence its period (P) = 12
c) The average value = 10/√2
d) The vertical shift (C) is the difference between the highest and lowest value.
Therefore, C = 30 - 10
C = 20
Plz answer this I need to do this today what is 948 divide by 244 plz answer!!!
Answer:
3.8852
Step-by-step explanation:
Answer:
3.885245902 or rounded 3.88
Step-by-step explanation:
divide 948 by 244
Use rounding (to the nearest 10) to estimate the product of 3217 x 44.
Answer:
141,548
Step-by-step explanation:
the product means you need to multiply
Which of these answers describes a conflict?
A hiker gets lost on a mountain during a snowstorm.
A hiker decides to try hiking a new trail.
A hiker takes her dog along on a camping trip.
A hiker tries out her new campi
Answer:
A
Step-by-step explanation:
Devontae uses 7 stars and 9 diamonds to make a design. Write two ratios that will be equivalent to 7/9.
Answer: 14/18 , 21/27 are ratios equivalent to 7/9's .
Which is the correct verbal expression for the mathematical expression 3n + 2?
Answer.3*n+2 =3+2 +3n+2Step-by-step explanation:
Neuroblastoma is a rare, serious, but treatable disease. A urine test, the VMA test, has been developed that gives a positive diagnosis in about 70% of cases of neuroblastoma. It has been proposed that this test be used for large-scale screening of children. Assume that 300,000 children are to be tested, of whom 8 have the disease. We are interested in whether or not the test detects the disease in the 8 children who have the disease. Find the probability that a) none will be missed. b) seven cases will be detected. c) two or more cases will be missed. d) exactly 75% will be detected. d) six or less cases will be detected.
Answer:
Part a) probability that none will be missed means none will have the disease= 0.058
Part b) probability that seven cases will be detected= 0.00122
Part c)probability that two or more cases will be missed.=0.744
Part d) ) probability that exactly 75% will be detected= 75% of 8= 6= 0.01000188
Part e) probability six or less cases will be detected = 0.171
Step-by-step explanation:
This is a binomial probability distribution . Here p= 0.7 and q= 1-0.7= 0.3 n= 8
Part a) none will be missed means none will have the disease
P (x= 0)= 8C0(0.7)^8 (0.3)^0
P (x= 0)=1*(0.7)^8 (0.3)^0=0.058
Part b) seven cases will be detected
P (x= 7)= 8C7(0.7)^1 (0.3)^7 = 0.00122
Part c) two or more cases will be missed.
1- P (x= 0)- P (x= 1)
1-0.058-0.198=0.744
Part d) ) exactly 75% will be detected= 75% of 8= 6
P (x= 6)= 8C6(0.7)^2 (0.3)^6=0.01000188
Part e) six or less cases will be detected.
1- P (x= 7)= 8C7(0.7)^1 (0.3)^7+P (x= 8)= 8C8(0.7)^0 (0.3)^8
1- 0.802+0.027=1- 0.829= 0.171
The University of Oklahoma has a renowned radar research program within the School of Electrical and Computer Engineering. Say that there are two radar prototypes under development, A1 and A2, and the effectiveness of each is determined by their ability to spatially detect a particular object. A1 has a probability of 0.5 of detecting the object, and A2 has probability 0.3 of detecting the object. a. Find the probability that the object is detected. b. Find the probability that the object is detected by exactly one of the radar prototypes. c. Given that the object was detected by exactly one of the prototypes, find the probability that it was A1 that detected it.
Answer:
a) = 0.65
b) = 0.5
c) = 0.7
Step-by-step explanation:
a)
First, using either A1 detected the object or A2 detected it or both did, the probability that the object is detected can be determined by any of it
so
P( probability that object is detected) = (p1 * q2) + (p2 * q1) + (p1 * p2)
so we substitute
P( probability that object is detected = (0.5 * 0.7) + (0.3 * 0.5) + (0.5 * 0.3)
= 0.65
b)
probability that object is detected by exactly 1 of the radar prototypes.
P( object is detected by exactly one of the radar prototypes ) = (p1 * q2) + (p2*q1)
= (0.5*0.7) + (0.3*0.5)
= 0.5
c)
probability that A1 that detected it.
using the Bayes theorem,
P(detected by A1 / detected by exactly one of the prototypes) = (p1 * q2) / (p1 * q2 + p2*q1) = (0.5 * 0.7) / (0.5 * 0.7) + (0.3 * 0.5)
= 0.35 / 0.5
= 0.7