Answers
cba
Step-by-step explanation:
first first one to see second one is b last one is a
Related Questions
Please use the following scenario for this question and the following 4 questions. The national academy of sciences reported in a 1997 study that 40% of research in mathematics is published by US authors. The math chairperson of a university wishes to test the claim that this percentage is no longer 40%. He has no indication of whether the percentage has increased or decreased since that time. He surveys a simple random sample of 130 recent articles published by reputable math research journals and finds that 62 of these articles have US authors. Does this evidence support the math chairperson's claim that the percentage is no longer 40%
Answers
Answer:
The evidence does not support the math chairperson's claim that the percentage is no longer 40%
Step-by-step explanation:
The known population percentage of research in mathematics published by US authors = 40%
The proportion, p = 0.40
Therefore, q = 1 - p = 1 - 0.4 = 0.6
The number of articles in the sample = 130
The number of articles by US authors in the sample = 62
Therefore, the proportion of US authors in the sample, [tex]\hat p[/tex] = (62/130) × 100 =
[tex]0.4\overline{769230}[/tex]
∴ The percentage of US authors in the sample ≈ 47.7%
The null hypothesis, H₀; p = 0.4
The alternative hypothesis, Hₐ; p ≠ 0.4
The z-test is given as follows;
[tex]z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p\cdot q}{n}}}[/tex]
[tex]z=\dfrac{0.477-0.40}{\sqrt{\dfrac{0.4\times 0.6}{130}}} \approx 1.792[/tex]
The p-value P(Z > 1.79) = 2 × (1 - 0.96327) = 0.07346
Therefore, given that the p-value is larger than 0.05 there is significant evidence in favor of the null hypothesis and we reject the alternative hypothesis
Therefore, also, there is not enough statistical evidence to support the math chairperson's claim that the percentage is no longer 40%.
Beatrice sold a house for 225000 and makes 7.5% commission. How much does she make for the sale?
A) 1687.50
B) 16,875
C) 168,750
D) 1,687,500
Answers
She makes 16875 commission
Can someone plz help me
Answers
Answer:
A = 28.27
Step-by-step explanation:
Answer:
9pi meters^2
Step-by-step explanation:
The area of a circle is pi * r^2. Basically, pi is simplified to 3.14 but for an exact answer, you'd leave it as a symbol. the "r" stands for the radius which is given(3). we square 3 to get 9. so the answer should be 9 pi or about 28.26.
I need help I don't know how to do this
Answers
Answer:
Step-by-step explanation:
If 1llm, find the value of x
Answers
Answer:
D
Step-by-step explanation:
HAHAHA
Answer:
E) 22
Step-by-step explanation:
[tex] l || m\: \&\:line\: j\: is \: their \: transversal [/tex]..... (given)
[tex]\therefore(5x - 16)\degree = (2x)\degree + 50\degree [/tex]
(Corresponding angles)
[tex]\therefore(5x - 16)\degree = (2x+50)\degree [/tex]
[tex]\therefore 5x - 16 = 2x+50 [/tex]
[tex]\therefore 5x - 2x = 16+50 [/tex]
[tex]\therefore 3x = 66 [/tex]
[tex]\therefore x =\frac {66}{3} [/tex]
[tex]\therefore x =22 [/tex]
Find the values of x and y . Write your answer in simplest form.
Answers
Answer:
y = 4 root 3, x = 8
Step-by-step explanation:
Please show your work the answer is 80cm^2 I js need the work please will mark brainliest extra points
Answers
Answer:
30.1 ft²
Step-by-step explanation:
The area of a triangle with an included angle and two sides cam be found using the formula, A = ½*ab*sin(C)
a = 7 ft
b = 9 ft
C = 73°
Plug in the values
Area = ½*7*9*sin(73)
Area = 30.1235998 ≈ 30.1 ft² (nearest tenth)
Find the following measure for this figure.
A
Х
0/60°
6
B
Area of circle =
O 6 square units
O 12 x square units
36 x square units
Answers
Answer:
Find the following measure for this figure. Area of circle = 36 I square units. Image: Find the following measure for this figure.
Step-by-step explanation:
If you place a 29-foot ladder against the top of a building and the bottom of the ladder is 24 feet from the bottom of the building, how tall is the building? Round to the nearest tenth of a foot.
Answers
Answer:
16.3
Step-by-step explanation:
The height of the building to the nearest tenth is 16. 3 ft
The situation forms a right triangle.
Properties of a right triangle:One of its angles is 90 degreesThe sides can can be found using Pythagoras theorem.The length of the ladder is the hypotenuse of the triangle formed.
The distance from the foot of the ladder to the bottom of the building is the adjacent sides.
Therefore,
c² = a² + b²
where
c = hypotenuse
a and b are the other two legs.
b² = 29² - 24²
b² = 841 - 576
b = √265
b = 16.2788205961
b = 16.3 ft
learn more on right angle here: https://brainly.com/question/23919428?referrer=searchResults
Given that 1 inch =2.54 Gm how many centimeters are there in 4 feet?
Answers
Answer:
121.92
Step-by-step explanation:
There's 121.92 centimeters in 4 feet.
Hope this helps! :^)
what is family ?
saw this is wuestion
Answers
MARK ME AS BRAINLIEST OK FRIEND
Family is a group of people who want as well as choose to be together embraced by a bond so powerful and strong that not even the slightest test of trials and troubles can breach.Family means nobody gets left behind or forgotten.
Answer:
Hello There!!
Step-by-step explanation:
Family consists of parents and their children.
hope this helps,have a great day!!
~Pinky~
PLEASE HELP ANS HURRY!
Abigail and her children went into a bakery and she bought $11.25 worth of cupcakes and cookies. Each cupcake costs $3.75 and each cookie costs $0.75. She bought a total of 7 cupcakes and cookies altogether. Graphically solve a system of equations in order to determine the number of cupcakes, x,x, and the number of cookies, y,y, that Abigail bought.
Answers
Number of cupcakes 2
number od cookies 5
Eight people go to a movie. Adult tickets cost $15 and children's tickets cost $8
The total cost was $85. Write an equation and use it to help you find the numbers of
adults and children who went to the movie.
Answers
Answer: number of adults = 3, number of children = 5
Step-by-step explanation:
let the number of adults be x, and the number of children be y.
x + y = 8 , 15x + 8y = 85
1st equation x 8 = 8x + 8y = 64
[tex]8x+8y-15x-8y = 64 - 85\\-7x = -21\\x=3[/tex]
substitute x=3
[tex]3+y=8\\y=5[/tex]
Find the value of x.
X =
Tell whether the side lengths form a Pythagorean triple.
o yes
no
Answers
Answer:
x = √72 and yes, it forms a Pythagorean triple
Step-by-step explanation:
a^2 + b^2 = c^2,
3 is a, x is b, anf 9 is c
3^2 + x^2 = 9^2
9 + x^2 = 81
Subtract 9 from both sides
x^2 = 72
x = √72
a Pythagorean triple is a^2 + b^2 = c^2, and this has it
Answer:
X = 9.4
Step-by-step explanation:
Pythagorean Theorem:
Formula: a² + b² = c²
9 x 9 = 81 3 x 3 = 9 81 + 9 = 90 √90 = 9.48 (Rounded 9.5)- A Pythagorean triple consists of any three positive integers.
Plz help this is due by tomorrow
Answers
Answer:
3.4
Step-by-step explanation:
just divide 8.16 by 2.4
:)
At last week's track meet, Stacy ran 9/12 of a km, Jules ran 4/5 of a km, and Raul ran 3/4 of a mile. Which two students ran the same distance?
Answers
Answer: No two students ran same distance
Step-by-step explanation:
Given
Stacy ran [tex]\frac{9}{12}[/tex] of a km i.e.
[tex]\Rightarrow 1\times \dfrac{9}{12}=\dfrac{3}{4}=0.75\ km[/tex]
Jules ran [tex]\frac{4}{5}[/tex] of a km i.e.
[tex]\Rightarrow 1\times \dfrac{4}{5}=0.8\ km[/tex]
Raul ran [tex]\frac{3}{4}[/tex] of mile i.e.
[tex]\Rightarrow 1\times \dfrac{3}{4}=0.75\ miles\\\\\text{1 mile=1.6 km}\\\\\Rightarrow 0.75\ miles=1.2\ km[/tex]
So, no two students ran the same distance.
Jenny went on a walk everyday for 4 weeks with her dog. She got paid $30 dollars everyday. How much money does she have?
Answers
Answer:
$840
Step-by-step explanation:
4 weeks = 28 days
28 x 30 = 840
The figure shows a person estimating the height of a tree by looking at the
top of the tree with a mirror. Assuming that both the person and the tree form
right angles with the ground, which of the following proportions can be used
to estimate the height of the tree?
Answers
Answer:
The proportion that can be used to estimate the height of the tree is option;
A. [tex]\dfrac{h}{12} = \dfrac{6}{5}[/tex]
Step-by-step explanation:
The given parameters in the question are;
The medium through which the person looks at the top of the tree = A mirror
The angle formed by the person and the tree with the ground = Right angles = 90°
The distance of the person from the mirror, d₁ = 5 ft.
The height of the person, h₁ = 6 ft.
The distance of the tree from the mirror, d₂ = 12 ft.
The angle formed by the incident light from the tree on the mirror, θ₁ = The angle of the reflected light from the mirror to the person, θ₂
Let 'A', 'B', 'M', 'T', and 'R' represent the location of the point at the top of the person's head, the location of the point at the person's feet, the location of the mirror, the location of the top of the tree and the location of the root collar of the tree, we have;
TR in ΔMRT = The height of the tree = h, and right triangles ΔABM and ΔMRT are similar
The corresponding legs are;
The height of the person and the height of the tree, which are AB = 6 ft. and TR = h, respectively
The distances of the person and the tree from the mirror, which are BM = 5 ft. and MR = 12 ft. respectively
∴ The angle formed by the incident light from the tree on the mirror, θ₁ = ∠TMR
The angle of the reflected light from the mirror to the person, θ₂ = ∠AMB
Given that θ₁ = θ₂, we have;
tan(θ₁) = tan(θ₂)
∴ tan(∠TMR) = tan(∠AMB)
[tex]tan\angle X = \dfrac{Opposite \ leg \ length \ to \ reference \ angle}{Adjacent \ leg \ length \ to \ reference \ angle}[/tex]
[tex]tan(\angle TMR) = \dfrac{TR}{MR} = \dfrac{h}{12}[/tex]
[tex]tan(\angle AMB) = \dfrac{AB}{BM} = \dfrac{6}{5}[/tex]
From tan(∠TMR) = tan(∠AMB), we have;
[tex]\dfrac{h}{12} = \dfrac{6}{5}[/tex]
[tex]\therefore h = \dfrac{6 \, ft.}{5 \, ft.} \times 12 \, ft. = 14.4 \, ft.[/tex]
The height of the tree, h = 14.4 ft.
Therefore, from the proportion [tex]\dfrac{h}{12} = \dfrac{6}{5}[/tex] the height of the tree can be estimated.
PLEASE HELP URGENT!!!!!!!!!!!!
Answers
Answer:
B) 155 sq. cm.
Step-by-step explanation:
225 - 70 = 155 sq. cm.
Answer:
i believe its B.
hope this helps.
its a benchmark, so do your best :)!
7. A boy on ice skates has a momentum of 200 kg m/s to the left at a velocity of 20
m/s. How fast is the boy going?
Answers
Answer: 10 m/s
Step-by-step explanation:
Given
Momentum of boy [tex]P=200\ kg.m/s[/tex]
Mass of boy is [tex]m=20\ kg[/tex]
Momentum is the product of mass and velocity
[tex]P=mv[/tex]
Substitute value
[tex]\Rightarrow 200=20\times v\\\Rightarrow v=10\ m/s[/tex]
Thus, the boy is moving with a velocity of 10 m/s
23% of a number is 147.2.
What is the original number?
Answers
the answer is 640.
if you take 640 and multiply it by .23 (because of 23%), you get 147.2 which is exactly what you are looking for.
Hope this helps! :)
Is -5, 12, 29, 46 an arthmetic sequence
Answers
Answer:
Yes
Step-by-step explanation:
if f (12) =4(12)-20 which function represents f(x)?
Answers
Answer:F(x)=4x-20
Step-by-step explanation:
The X on both sides is 12.
Answer:
The graph of f (x)=[x+2] after it is translated 4 units to the right
A mortgage has the terms shown below:
Balloon mortgage
$300,000
25/5 balloon
6% annual rate
Initial Monthly Payment: $1932.90
What is the amount of the balloon payment rounded to the nearest dollar?
Answers
Your construction company needs to pay a large bill for materials. You decide to pay the bill over the next few months. The bill is $8,970. The first month, you paid $1,250. How much do you still owe for the materials?
$5,970
$6,720
$7,720
$10,120
$10,220
Answers
Answer: 7,720
The answer is 7,720! got the question correct with it
Use the first three non-zero terms of a Maclaurin series to estimate the integral from 0 to 1 of the cosine of x squared, dx .
0.905
0.904
0.806
1.016
Answers
HELPPPP ASAPPP
Shane wants to create a patio that is a parallelogram What is the m angle DAB of to ensure the patio is a parallelogram ?
Answers
HELP, MCQ urgent, now
Answers
Answer:
angle 13 and 16 is your answer ☺️☺️☺️
Answer:
∠13 and ∠16.
Step-by-step explanation:
The definition of adjacent angles is "two angles that have a common vertex and a common side but do not overlap" (Varsity Tutors). In accordance with the standards, only angles 13 and 16 are adjacent.
Hope this helps!
A child's ticket to a concert costs x and an adult ticket cost four times as much as a child's ticket The difference between Mrs. Royal ticket and her
child's tickets is $600.
(a) Write an equation to show this information.
(b) Solve your equation and write down the cost of an adult ticket.
Answers
Answer:
Mrs.Royal's ticket costs $800.
Step-by-step explanation:
Child's Ticket= x
Adult's Ticket= 4x
4x-x=600
3x=600
x=200
200*4=800
ASAP WILL MARK BRAINLIEST
Find the volume of the following. Give exact values. I
A sphere with radius 9
Answers
<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3
Volume
= 4 / 3 πr ^ 3
= 4 / 3 × π × 93
= 972π
= 3053.6280592893 feet3
<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3
Branilest?
<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3