Respuesta:
(2945.411; 3054.589)
Explicación paso a paso:
Dado ;
Tamaño de la muestra, n = 50
Media, xbar = 3000
Desviación estándar, s = 200
Nivel de confianza, Zcrítico al 95% = 1,96
El intervalo de confianza se define como:
Xbar ± margen de error
Margen de error = Zcrítico * s / sqrt (n)
Margen de error = 1,96 * 200 / sqrt (50)
Margen de error = 54.589
Límite inferior = (3000 - 54.589) = 2945.411
Límite superior = (3000 + 54.589) = 3054.589
(2945.411; 3054.589)
At a high school, 18% of all students are in the school musical and the choir, and 32% of the students are in the school musical. What is the probability that a student is in the choir, given that the student is in the school musical
Answer: 56.25%
Step-by-step explanation:
Probability that student is in the school musical and choir = Probability that student is in choir given that they are in musical * Probability that student is in the school musical
Changing the subject of the formula:
Probability that student is in choir given that they are in musical = Probability that student is in the school musical and choir / Probability that student is in the school musical
= 18% / 32%
= 56.25%
Choose the three rectangles that have a perimeter of 12 meters.
Answer:
I think the answers would be a d and b
Step-by-step explanation:
the perimeter formula for a rectangle is 2L + 2W
if we take the measurements for rectangle a and add 4 + 4, we get 8. then we can do 2 + 2 to get 4. lastly, we would add 8 + 4, which equals 12.
for rectangle d, we can do 3 + 3, which equals 6. because the measurements are the same on each side, we don't have to do another equation and we would just add 6 + 6 to get 12.
and for rectangle b, you can do 1 + 1 = 2 and 5 + 5 = 10, then add 10 and 2 together to get 12.
Kendall went to the candy store and bought 2 pounds of candy. If 1/5 of Kendall's candy was chocolate, how many pounds of chocolate candy did Kendall buy?
The answer is 1/10
This is simple division
The equation is (1/5÷2)
I did my work on a sheet of paper so i know i did this correctly
My explanation of my work:
Keep change flip is the operation used here
So you keep 1/5 ,change the division sign to multiplication and flip the 2/1 into 1/2 so the new equation is (1/5x1/2) the answer to that is 1/10
Have an amazing day :)
-yO mAmA
I NEED HELP ON THIS ILL GIVE 10 POINTS!
Answer:
area is 60 cm sq units
Step-by-step explanation:
16+12+12+20=
16+24+20
40+20=60
Yes or no???????????
Yes it is. It's a pythagorean triple.
Giving brainlist to who answeres this!
Answer:
Pretty sure its 20
Step-by-step explanation:
I just did the math
Answer:
5 i think
Step-by-step explanation:
§(*￣▽￣*)§§(*￣▽￣*)§§(*￣▽￣*)§§(*￣▽￣*)§§(*￣▽￣*)§(∪.∪ )...zzz(∪.∪ )...zzz(∪.∪ )...zzz(∪.∪ )...zzz
What is the value of x in the equation 1/3x+7=−2?
Answer:
x = -27
Step-by-step explanation:
[tex]\frac{1}{3} x+7=-2\\\\\frac{1}{3} x=-2-7\\\\\frac{1}{3} x=-9\\\\x=-27[/tex]
Please help ASAP! Thanks a lot
Which of the following does a rigid motion preserve?
A. Side lengths only
B. Angle measures only
C. Side lengths and angle measure
D. Neither side lengths nor angle measures
Answer:
c
Step-by-step explanation:
I don't understand this: If Kelly spins the spinner 120 times, how many times would you predict the spinner lands on pink based on experimental data? Show your work in the box below the image.
Pink:6
purple:12
yellow:9
Blue:13
The expected value of the spinner landing on pink will be 18.
What is the expected value?The anticipated value is an extension of the weighting factor in statistical inference. Informally, the anticipated value is the simple average of a significant number of outcomes of a randomly selected variable that was separately chosen.
The expected value is given below.
E(x) = np
Where n is the number of samples and p is the probability.
If Kelly spins the spinner 120 times. The table is given below.
Color Frequency
Pink 6
Purple 12
Yellow 9
Blue 13
Total 40
Then the probability of the pink color will be
p = 6 / 40
p = 0.15
Then the expected value of the spinner landing on pink will be
E(x) = 120 x 0.15
E(x) = 18
The expected value of the spinner landing on pink will be 18.
More about the expected value link is given below.
https://brainly.com/question/13945225
#SPJ2
PLEASE SOLVE QUICK WILL GIVE BRAINLIST IF CORRECT
Answer:
you got it right
Step-by-step explanation:
Identify the indicated parts of the figure below.
Answer:
The top one is a triangle which is the back part of the shape. The bottom left one is also a triangle and the bottom right one is a rectangle
Can anybody help me?
Alonzo rented a truck for one day. There was a base fee of $20.99, and there was an additional charge of 73 cents for each mile driven. Alonzo had to pay
$215.90 when he returned the truck. For how many miles did he drive the truck?
If f(1)=-2 and f(n)=3f(n-1)-5, then f(3)=
Answer:
f(3) = - 38
Step-by-step explanation:
f(2) = 3 f(2 - 1) - 5 = 3 f(1) - 5 = 3(-2) - 5 = -6 - 5 = -11
f(3) = 3 f(3 - 1) - 5 = 3 f(2) - 5 = 3(-11) - 5 = - 33 - 5 = - 38
8. Find m Using the parallelogram
Answer:
w = 80
Step-by-step explanation:
Common geometry math
Evaluate the expression for the given value of x. 3x - 2 for x = 5
Answer:
Step-by-step explanation:
The question requires you to substitute x=5 into the expression, 3x-2.
The expression, therefore becomes:
3(5)-2
15-2
=13
Answer:
13
Step-by-step explanation:
If x equals 5 then the new equation would be
3(5)-2
3*5=15
so
15-2
which is 13
plsssss helpñ i would appreciate it!!!
How far in feet will a child on the edge of the merry-go-round travel? If r=6 feet, the angle is 310
Answer:
First some theory we need to solve this problem.
For a circle of radius R, the perimeter is:
P = 2*pi*R
where pi = 3.14
If we have a section of this circle, defined by an angle θ, the length of this arc will be:
A = (θ/360°)*2*pi*R
In the case of the problem, the total distance that the child travels is equal to the length of an arc of 310° in a circle of radius r = 6ft.
Using the above formula, we know that the length of this arc is:
A = (310°/360°)*2*3.14*(6ft) = 32.4 ft
George bought a rose bush at retail for $24. The wholesale price was $15. What was the markup?
Answer:
60%
Step-by-step explanation:
multiply 15 and 60%
Have a nice day!
I NEED HELP AHHHHHHHHH> PLS NO LINKS CAUSE I HAVE A RESTRICTED COMPUTER!!!!
Answer:
18.6 cm²
Step-by-step explanation:
99/7 + 9/2
= 18.6 cm²
could anyone help me with this?
Out of a random sample of 330 apples, 25 are rated "AAA." Estimate the number of apples that would be rated "AAA" in a crop of 50,000 apples.
Answer:
3750 apples
Step-by-step explanation:
Prob (Apple AAA rating) = AAA rated apples / Total Apples
25 / 330 = 0.075
Expected apples rated AAA from 50000 apples = P(AAA rating) x Apples no.
0.075 x 50000
3750
y = -x + 1 | what is the slope and y-intercept? step by step please.
it's in slope intercept form,, y=mx+b
m is slope
b is y-int
slope: -1
y-int: 1
*PLZ ANSWER :)* Find the area of the following figure:
A.) 300cm²
B.) 400cm²
C.) 252cm²
D.) 312cm²
Answer:
D) 312 square cm
Step-by-step explanation:
The area of the rectangle is 192 square cm (16*12). The area of each triangle is 60 square cm (12*10/2). 192+60+60=312 square cm
A survey was taken of local residents to determine their favourite sport to watch live. The survey results are shown on the graph. How many respondents preferred to watch either football or soccer? 
Answer:
35 out of 75
Step-by-step explanation:
How tall would the tree be?
Answer:
26 feet
Step-by-step explanation
Express 9.08 as a fraction in its simplest form
Answer:
[tex]9\frac{2}{25}[/tex]
Step-by-step explanation:
The sum of four consecutive integers is -294. Find the integers
Use the figure to identify the correct rule for the
translation,
O (x, y) = (x-3, y + 4)
O(x, y) = (x + 3, y - 4)
(x, y) + (x - 4, y + 3)
(x, y) = (x + 4, y - 3)
Answer:
A) (x,y)--> (x - 3, y + 4)
Step-by-step explanation:
edge
Answer:
a
Step-by-step explanation:
