Answer:
Step-by-step explanation:
area of a square = S x S
side = ⱱarea
side = ⱱ100
side = 10cm
perimeter = 4s
= 4 x 10
=40cm
With 95% confidence, the researcher estimates the mean birth weight of all babies born to women who are over the age of 40 to be between 2935 and 3135 grams. The researcher wants to maintain the 95% level of confidence but report a confidence interval with a smaller margin of error. What should she do
This question is incomplete, the complete question is;
A medical researcher wants to estimate μ, the mean weight of babies born to women over the age of 40.
The researcher chooses a random sample of 100 pregnant women who are over 40. Using the mean birth weight of the 100 babies in the sample, the researcher calculates the 95% confidence interval for μ.
With 95% confidence, the researcher estimates the mean birth weight of all babies born to women who are over the age of 40 to be between 2935 and 3135 grams.
The researcher wants to maintain the 95% level of confidence but report a confidence interval with a smaller margin of error. What should she do
a) Redo the study and choose a different sample of size 100
b) Redo the study, but this time with a sample size 64
c) Redo the study, but this time with a sample 225
Answer:
Option C) is the correct answer.
C) Redo the study, but this time with a sample 225
Step-by-step explanation:
Given that;
A medical researcher wants to estimate μ, the mean weight of babies born to women over the age of 40.
n = 100
95% confidence interval is given ( 2935, 3135)
But the researcher wants to maintain the 95% level of confidence as well as smaller margin of error.
Therefore we have to reduce the margin of Error
and we know that if the sample size increases, the margin of Error decreases i.e it becomes smaller.
so the best option for the researcher is to redo the study with a larger sample size so the margin of Error becomes smaller.
Option C) is the correct answer.
c) Redo the study, but this time with a sample 225
Which equation is equivalent to n + 4 = 11? *
O (n +4 × 2 = 11
(n + 4) x 2 = 1112
(n+ 4) x 2 = 1184
O (n+4) x 2 = 11 * 2

Answer:
(n + 4) *2 = 11 * 2
Step-by-step explanation:
(n + 4) *2 = 11 * 2
Divide both sides by 2
[tex]\frac{(n + 4) *2}{2} = \frac{11 * 2}{2}[/tex]
n + 4 = 11
A rocket ship is travelling at an average speed of 1.75 × 104 miles per hour. How many miles will the rocket ship travel in 1.2 × 102 hours?
Answer:
The rocket ship will travel 2.1 × 10y miles.
Step-by-step explanation:
Jackson builds legos at a rate of 3 projects per hour. Write a function that represents the relationship between the amount of Legos built, b, and the number of hours he works, h.
Answer:b=3h
Step-by-step explanation:
i think im alright as a person but keeping all these points to get answers from something i gotta do its not alright. but if you want a brainliest answer this question
(Why did 10 not go to thanks giving this year?)
Answer:
is this a joke or riddle or is this a real question sry?
Step-by-step explanation:
Please I need some answers
Answer:
prime: 17 47 67
Composite: 25 48 99 161 171
25: 1,5,25
48: 1,2,4,6,8,12,24,48
99: 1, 3, 9, 11, 33, 99
161: 1, 7, 23, 16
171: 1,3,9,19,57,171,
And can i please get brainliest and have a good day
If 12 g of a radioactive substance are present initially and eight years later only 6 g remain, how much of the substance will be present after 11 years
Answer:
4.083g
Step-by-step explanation:
12 g of a radioactive substance are present initially and eight years later only 6 g remain, how much of the substance will be present after 11 years
Starting with half life, we want to find k.
In a 4 year period, t=8 and A quantity will be reduced to (1/2)*A.
(1/2)= e^k8
In(1/2)
Cans of corn are on sale at 10 for $4. What is the cost of 15 cans
Answer:$6
10*1.5=15
4*1.5=6
Step-by-step explanation:
1. A grid shows the position of a subway stop and your house. The subway stop is located at (-10, -1) and your house is located at (-18, -16). What is the distance between your house and the subway stop?
A.17
B.22
C.19
D.15
Select the expressions that are equivalent to 12n - 8 sellect all that apply .
Answer:
B,D,and E
Step-by-step explanation:
Its not A bc A is 10n+8
Its not C bc C is 36n-12
The price of a can of beans is raised from 64 cents to 74 cents. Approximately what is the percent of increase in the price of the can of beans?
Answer:
15.6%
Step-by-step explanation:
The formula for the percent of change is
Original - new/ original
So
(74-64)/ 64 = 0.1562
Make that a percent
15.6%
I need some help please i give brainly, thanks and 5 stars
Answer:
Pretty sure it's B. 5/8
good luck
Step-by-step explanation:
A party-favor bag must have a volume of 140 cubic inches and the dimensions that are shown below. The equation x cubed + 6 x squared minus 27 x = 140 can be used to find x. A bag has a height of x + 9 inches, a width of x minus 3 inches, and a length of x inches. What are the dimensions of the party-favor bag? Use a graphing calculator and a system of equations to find the answer. The length is 7 inches, the width is 4 inches, and the height is 16 inches. The length is 5 inches, the width is 2 inches, and the height is 14 inches. The length is 4 inches, the width is 1 inch, and the height is 13 inches. The length is 3 inches, the width is 0 inches, and the height is 12 inches.
Answer:
B
Step-by-step explanation:
Edge2021
Answer:
B the length is 5 inches
Step-by-step explanation:
width is 2 inches height is 14 inches
A salesperson makes 8% commission on everything she sells. How much money would she make if she sold $200 worth of merchandise?
Answer:
$16
Step-by-step explanation:
A sales person makes 8% on everything she sells
She sold $200 worth of merchandise
The amount of money that will be made can be calculated as follows
= 8/100 × 200
= 0.08 × 200
= $16
Hence the sales person will make $16
What is the perimeter of this figure?
Answer:210. 2/3
you would have to add all the numbers to get the answer even the fractions
Answer:
230.6 or 692/3
Step-by-step explanation:
365/6 + 326/6 + 356/6 + 337/6 = 1384/6 = 692/3 = 230.6
Find... (look at the picture)
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
KJI = KJY + YJI
Thus ;
[tex]168 =( 8x - 4) + (36x - 4)[/tex]
[tex]168 = 8x - 4 + 36x - 4[/tex]
Collect like terms
[tex]168 = 44x - 8[/tex]
Add sides 8
[tex]168 + 8 = 44x - 8 + 8[/tex]
[tex]176 = 44x[/tex]
Divide sides by 44
[tex] \frac{176}{44} = \frac{44}{44} x \\ [/tex]
[tex] \frac{16 \times 11}{4 \times 11} = x \\ [/tex]
[tex]4 = x[/tex]
[tex]x = 4[/tex]
So ;
[tex]YJI = 36x - 4[/tex]
[tex]YJI = 36(4) - 4[/tex]
[tex]YJI = 144 - 4[/tex]
[tex]YJI = 140°[/tex]
Done...
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
Use the picture
KIJ = _______
By ______
Answer:
first one
Step-by-step explanation:
because they have 2 angles the same and a side by reflexive property
Which graph is this?
four added to twice a number yield 26/5. Find the number.
Answer:
3/5 is the answer
sry if it's wrong
Answer:
X=3/5
Step-by-step explanation:
Let number=X
Solution
2x+4=26/5
Cross multiply then we get
10x+20=26
10x=26-20
10x=6
X=6/10
X=3/5
So the no is 3/5
7x^2-8x+2, what are a,b, and c?
Answer:
a=7 b=-8 c=2
Step-by-step explanation:
7x²-8x+2=0
a=7 b=-8 c=2
Find f(-5) If f(x) = lx+ 1l.
what is 52.03 squared?
Answer:
It is 2707.1209
Step-by-step explanation:
What’s the slope of the graph? (photo included)
giving out brainliest!
Answer:
Using the slope formula with points (0,-1) and (-4,4)
Step-by-step explanation:
Step 1: find the points, (0,-1) and (-4,4)
Step 2: Insert plot points into Slope formula: (tip: M means slope)
m(slope)= [tex]\frac{y_{2} - y_{1}}{x_{2}-x_{1}}[/tex] -> m(slope)=[tex]\frac{4-(-1)}{-4-0}[/tex]
Step 3: Solve:
m(slope)=[tex]\frac{5}{-4}[/tex]
Answer:
Slope is [tex]\frac{5}{-4}[/tex]
or m = [tex]\frac{5}{-4}[/tex]
OR (if your teacher wants the answer in decimal form rounded to the nearest 10th.) m = -1.3
Tickets to a fundraiser are $14 if purchased ahead of time, and $25 if purchased at the door. The total amount raised from all ticket sales was $788. If the number of tickets purchased ahead of time was five less than the number of tickets that were purchased at the door, how many tickets were purchased at the door?
Answer: 25(11)=275 which is the price of the 11 bought at the door
Find the point-slope equation of the line contains (-2,-3) and having slope m=4
Answer:
y + 3 = 4 x (x + 2)
Step-by-step explanation:
point slope formula is y-y1 = m(x-x1)
slope intercept form is y = 4x + 5
y=mx +b
m=4
The function f(x) is shown on the graph.
If f(x) = 0, what is x?
Answer:
x = 0
Step-by-step explanation:
Help and show all work please
Answer:
all my work is in the picture but srsly pls u should make another question with more points... blank tho :( this took a rlly long time, pls?
A box contains 14 large marbles and 11 small marbles. Each marble is either green or white. 8 of the large marbles are green, and 5 of the small marbles are white. If a marble is randomly selected from the box, what is the probability that it is small or green?
Answer: 19/25.
Step-by-step explanation:
Given data:
Large marbles = 14
Small marbles = 11.
8 large marbles = green.
5 of small marbles = white.
Solution:
If 8 of large marbles are green, therefore the remaining 6 are white.
Likewise for the small marbles the remaining 6 are green marbles.
Total number of marbles = 14 + 11
= 25.
P(small or green) = P(small) + P (green) – P (Both)
= 11/25 + 14/25 – 6/11
= 19/25
Answer:
Answer is 0.7536
Step-by-step explanation:
Large Marbles = 14 Small Marbles = 11
Green LM = 8 Green SM = 6
White LM = 6 White SM = 5
QUESTION:
If a marble is randomly selected from the box, what is the probability that it is small or it is green?
Note the use of "or" and not "and".
SOLUTION:
In this case, the two events - small marble & green marble - are NOT mutually exclusive. This means that sometimes they occur together. We can have a marble that is both small and green!
The formula for this probability is hence
P(A or B) = P(A) + P(B) - P(A and B)
Let A = The event that the selected marble is small
B = The event that the selected marble is green
Total number of marbles = 14 + 11 = 25
P(A or B) = 11/25 + (8+6)/25 - [P(A) × P(B)]
P(A or B) = 11/25 + 14/25 - [11/25 × 14/25]
= 0.44 + 0.56 - 0.2464 = 1 - 0.2464 = 0.7536
why...WHY..............
Answer:
because I said so....that's why
Answer:
BECAUSE TEACHERS WANT US TO SUFFER
Step-by-step explanation:
Which graph shows a set of ordered pairs that represents a function?
Answer:
2nd Graph
General Formulas and Concepts:
Algebra I
Vertical Line Test - A function's x-values must have only 1 corresponding y-value. If the function fails this test, it is not a function.Step-by-step explanation:
When we apply the Vertical Line Test to the 1st graph, it does not pass (x = 1). Therefore, the 1st graph is not a function.
When we apply the Vertical Line Test to the 2nd graph, it does pass. Therefore, the 2nd graph is a function.
When we apply the Vertical Line Test to the 3rd graph, it does not pass (x = 2). Therefore, the 1st graph is not a function.
When we apply the Vertical Line Test to the 4th graph, it does not pass (x = -3). Therefore, the 4th graph is not a function.
Answer:
2nd graph is correct
Step-by-step explanation: