Answer:
73220±566.72Step-by-step explanation:
The formula for calculating the confidence interval is expressed as;
CI = xbar ± z*s/√n
xbar is the sample mean = $73,220
z is the z score at 99% CI = 2.576
s is the standard deviation = $4400
n is the sample size = 400
Substitute the given values into the formula;
CI = 73,220 ± 2.576*4400/√400
CI = 73,220 ± 2.576*4400/20
CI = 73,220± (2.576*220)
CI = 73220±566.72
Hence a 99% confidence interval for μ is 73220±566.72
tosta las siguientes preguntas
a) ¿Qué fracción de la barra completa me quiere regalar Memo?
b) ¿Qué fracción de la barra completa me regalaria si decide darme solo la tercera parte de lo que tiene
c) ¿Qué fracción seria si decide darme 275 partes de lo que le queda?
do queremos calcular ura fracción de una fracción, en realidad se traduce en una multiplicacion
one
La cuarta parte de la mitad
GIVING BRAINLIST ASAP
Find the sales price:
$45.50 book, 30% discount
Round your answer to the nearest cent (hundredths place)
Answer:
$32.00
Step-by-step explanation:
Answer: $65.00 or 6500 cents
Step-by-step explanation:
If original price=100%
and discount= 30%
New value=100-30
70%
If 70%=$45.50
Then 100%=100x45.50/1
=6500
=$65.00 or 6500 cents
-
18 The diagram shows triangle PQR.
Diagram NOT
accurately drawn
P
17.8 cm
360
R
26.3 cm
Calculate the length of PR.
Give your answer correct to 3 significant figures.
Answer:
The length of PR is 15.8 cm
Step-by-step explanation:
We will solve the question using the cosine rule
In ΔPQR
∵ (PR)² = (PQ)² + (RQ)² - 2(PQ)(RQ)(cos∠Q)
∵ PQ = 17.8 cm
∵ RQ = 26.3 cm
∵ m∠Q = 36°
→ Substitute them in the rule above
∵ (PR)² = (17.8)² + (26.3)² - 2(17.8)(26.3)(cos36)
∴ (PR)² = 316.84 + 691.69 - 936.28(cos36)
∴ (PR)² = 251.0635685
→ Take √ for both sides
∴ PR = 15.8449856
→ Correct it to 3 significant figures
∴ PR = 15.8 cm
∴ The length of PR is 15.8 cm
If Triangle ABC is rotated 90 degrees clockwise about the origin, what will be the new coordinates of vertex B?
(A) (-1,-4)
(B) (1.4)
(C) (4,1)
(D) (4, -1)
Answer:
ithe answer to your question is going to be c
Maria practice the piano 5/6 of an hour everyday. How many hours does she practice in 4 days
find the sum
(−5x2+4x−2)+(−8x2+2x+1)
Answer:
3[tex]x^{2}[/tex] + 6x - 1
Step-by-step explanation:
(-5[tex]x^{2}[/tex] + 4x - 2) + ( 8[tex]x^{2}[/tex] + 2x + 1)
1.Remove parenthesis
-5[tex]x^{2}[/tex] + 4x - 2 + 8[tex]x^{2}[/tex] + 2x + 1
2. Combine like terms
3[tex]x^{2}[/tex] + 6x - 1
Answer:
I believe that he answer is -8x squared -x +3.
Step-by-step explanation:
A circular lawn has a row of bricks around the edge. The diameter of the lawn is
about 40 feet.
Question 1
3 pts
Which is the best estimate for the amount of grass in the lawn?
125 feet
125 square feet
1,250 feet
1250 square feet
Answer:
Step-by-step explanation:
Answer:
Area of the grass in the circular lawn is 1250 square feet
Step-by-step explanation:
Lawn is in the shape of circle having radius = 20 feet
Area of the circular lawn will be represented by the formula,
Area = πr² [ Here 'r' = Radius of the circular lawn]
= (3.14)(20)²
= 3.14 × 400
= 1250 square feet
Therefore, area of the grass in the circular lawn will be 1250 square feet
Answer:
1250 square feet
Step-by-step explanation:
A = pie × radius^2
The question is below (This an order of operation question)
Answer:
lcm of 3 and 9 is 9
3/4 - 3/4 × ( 2/3 + 1/9 )
0/4 × ( 6/9 + 1/9)
0 × 7/9
0
the answer is zero....
Step-by-step explanation:
when u substract and number by itsself u get 0...
when u multiply 0 by a number you get 0...
i hope this helps...
please give me brainliest if possible......
have a great day ahead :)
Answer: 0. 166
Step-by-step explanation: I used the demos scientific calculator I suggest using it it's awesome!
my favorite snack after a long day at school
Answer:
My dog
Step-by-step explanation:
Answer:
cheese doodles is it.
Also subscribe to Random Topics trending in youtub.
Step-by-step explanation:
Find the value of X and Y. If your answer is not an integer, express it in simplest
radical form
7.385 rounded to the nearest tenth
Answer:
10 lol..................
Answer:
It should be 7.4
Step-by-step explanation:
How do you know which standardized test statistics you will use? A Z or T?
Answer:
If you're taking the AP Statistics test, you'll need to know the general formula for a standardized test statistic. Standardized test statistics are used in hypothesis testing. The general formula formula is: Standardized test statistic: (statistic-parameter)/(standard deviation of the statistic).
Step-by-step explanation:
Answer:
Standardized test statistics are used in hypothesis testing. The general formula formula is: Standardized test statistic: (statistic-parameter)/(standard deviation of the statistic).
Sorry to bother again, but this is the last one I'll do
Use the distributive property to identify the equivalent expression.
12s + 18r
Group of answer choices :
2(9s + 6r)
6(2s + 3r)
3(6s + 4r)
6(3s + 2r)
Answer:
6(2s + 3r)?
Step-by-step explanation:
A restaurant bill is $56.39 calculate 20%
Answer:
$11.29. $56.39 divided by 5, which is 20 percent, gives you around 11.287. Round up, and you get $11.29
Step-by-step explanation:
Answer:
11.278 Is the exact answer.
Step-by-step explanation:
PLEASE MARK BRAINLIESTWrite the relation as a set of ordered pairs.
Please help. Thank you.
Answer:
a
Step-by-step explanation:
because it must write object first before image
Answer: A...
Step-by-step explanation:
they are literally lined up ¯\_(ツ)_/¯
There are 2,380 seats in the auditorium. There were 35 seats in each row of the auditorium. how many rows are there?
Answer:
There are 68 rows
Step-by-step explanation:
2,380 divided bye 35 is 68
Answer: 68 rows
Step-by-step explanation:
If this helped you put a thanks and review please?!
the sum of the first six terms of a geometric series is 21/16 . if the common ratio is -1/2 , what is the first term?
Answer:
-84
Step-by-step explanation:
The formula for the nth term of a geometric progression is
Un = ar^n- 1
The sum of the first six terms of a geometric series (U6) = 21/16
Common ratio = -1/2 ,
a = First term ??
21/16 = a × (-1/2 )^6- 1
21/16 = a ×(-2^-1)^5
21/16 = a × -2^-6
Cross Multiply
16 × a × -2^-6 = 21
a = 21/16 × -2^-6
a = 21/16 ×- 1/2⁶
a = 21/16 × -1/64
a = 21 ÷(-1/4)
a = 21 × -4
a = -84
The first term = 84
Adrian gets a loan for $500 to go on a trip. He borrows the money at 5% interest for 1 year. Find the interest Adrian will pay on the loan.
Answer:
Step-by-step explanation:
500*5%= $25.00 interest
Find the sum 5.5+7.25-5.5+(-7.25) show your work
Answer:
5.5+7.25−5.5−7.25 = 0
Step-by-step explanation:
To be honest, you shouldn't have to show work for an equation like this. But this is the answer. Hope it helped.
Answer:
5.5+7.25-5.5+(-7.25)
step 1: add 5.5 and 7.25
12.75−5.5−7.25
step 2: subtract 5.5 from 12.75
7.25−7.25
The answer is 0.
Step-by-step explanation:
Brainliest?
15% of the cost of a computer was tax. If the tax was $180, what was the cost of the computer?
A $1,000
B $1,020
C $1.200
D $1.500
Answer:
C. 1200
Step-by-step explanation:
3.
1
y=x+3
1
slope: +: y-intercept: 3
4
B slope: 4; y-intercept: -3
1
slope: ; y-intercept: -3
D slope: 4; y-intercept: 3
PLEASE HELP ME
Answer:
A
Step-by-step explanation:
remember y=Mx+b where M is slope mad B is y intercept
The ratio of the length to the width of a rectangular field is 4 to 3. If the field is 120 yards long, how wide is the field?
Answer:
10 yards
Step-by-step explanation:
i think throught a calculator
Sorry if the quality is blurry
Answer:
False,False,False and last one is true
Write the expression in exponent form.
(9)(9)9)(9)(9)
Answers
9^5
please make me brainlist
Answer:
9^5
Step-by-step explanation:
My teacher doesnt really explain stuff good cause of her accent. May someone please explain how to do the problem and the correct answer? (no Trolls please) the problem is in the pic below
Answer:
hey sisters
Step-by-step explanation:
Write the equation of a line that is parallel to the line y=3/2x-4 and contains the point (6,-1)
Answer:
y = 3/2x - 10
Step-by-step explanation:
Parallelism: The same slope but different intercepts
1 - Using the slope and point given find the new y intercept
y = 3/2x + b
-1 = 3/2(6) + b
-1 = 18/2 + b
-1 = 9 + b
-9 -9
-10 = b
2 - Write the new equation using the same slope but different y-intercepts
y = 3/2x + b
y = 3/2x - 10
>) Jaxson and Bryon collected an equal amount of
money during a car wash. They collected cash and
checks as shown below. If each check is written for
the same amount, x, what is the total amount of
money collected by both boys? Explain.
Jaxson
Bryan
Jaxson
Bryon
Answer:
Step-by-step explanation:
We need the chart or other information.
Which type of transformation is shown here?
41
O reflection
O translation
O rotation
O dilation
Answer:
I am pretty sure it is a rotation
Step-by-step explanation:
Reflection will look different
Translation is moving things
And Dilation is making the things bigger or smaller
An insect is 3.5 millimeters long. Which expression finds the length of the insect in decimeters? Use the metric table to help answer the question. Metric Table kilo- hecto- deka- unit deci- centi- milli- 1,000 100 10 1 0.1 0.01 0.001 3.5 times 100 3.5 divided by 100 3.5 divided by 10 3.5 times 10
Answer:
3.5 divided by 100
Step-by-step explanation:
So we know that one millimeter is equal to 0.01
To solve the equation you would multiply 3.5 x .01 = .035
Another way would be if you divide 3.5/100 = .035
Hope that helps and have a great day!
Answer:
b
Step-by-step explanation:
write the equation in slope-intercept form of the line that passes through (6,-11) and is parallel to the graph of y=-2/3x+12
Answer:
[tex]y = -\frac{2}{3}x - 7[/tex]
Step-by-step explanation:
Given
[tex]Point = (6,-11)[/tex]
[tex]Equation: y = -\frac{2}{3}x + 12[/tex]
Required
Determine the equation of the point
First, we need to determine the slope of the point.
Since the point is parallel to the given equation, then they have the same slope (m).
The general form of an equation is:
[tex]y = mx + b[/tex]
Where
[tex]m = slope[/tex]
By comparison:
[tex]m = -\frac{2}{3}[/tex]
The equation of the point in slope intercept point is:
[tex]y -y_1 = m(x-x_1)[/tex]
Where
[tex]m = -\frac{2}{3}[/tex]
[tex](x_1,y_1) = (6,-11)[/tex]
Substitute these values in the equation:
[tex]y - (-11) = -\frac{2}{3}(x - 6)[/tex]
[tex]y +11 = -\frac{2}{3}(x - 6)[/tex]
[tex]y +11 = -\frac{2}{3}x + \frac{2}{3}*6[/tex]
[tex]y +11 = -\frac{2}{3}x + 4[/tex]
Subtract 11 from both sides
[tex]y = -\frac{2}{3}x + 4-11[/tex]
[tex]y = -\frac{2}{3}x - 7[/tex]