please help ive asked multiple times and still no help:( please help me if u can and PLEASE don’t put a silly answer, i really need the help

Answer:

a=7 b=-8 c=2

Step-by-step explanation:

7x²-8x+2=0

a=7 b=-8 c=2

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

Answer:

because I said so....that's why

Answer:

BECAUSE TEACHERS WANT US TO SUFFER

Step-by-step explanation:

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

Answer:b=3h

Step-by-step explanation:

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?

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

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

Answer: 25(11)=275 which is the price of the 11 bought at the door

Answer:

Pretty sure it's B. 5/8

good luck

Step-by-step explanation:

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

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

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

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)

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

Answer:

x = 0

Step-by-step explanation:

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

Answer:$6

10*1.5=15

4*1.5=6

Step-by-step explanation:

Answer:

2nd Graph

General Formulas and Concepts:

Algebra I

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:

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

Answer:

b=120

Step-by-step explanation:

Using proportions, it is found that the final price of the new computer monitor is given by:

b. 120

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

It is regularly priced at $200 but it is now on sale for 25% off, hence 75% of $200 is paid, so:

P1 = 0.75 x 200 = 150.

You can also use your 20% off coupon, hence the final price is of 80% of $150, then:

FP = 0.8 x 150 = $120.

Which means that option B is correct.

More can be learned about proportions at https://brainly.com/question/24372153

#SPJ2

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%

Answer:

The rocket ship will travel 2.1 × 10y miles.

Step-by-step explanation:

Answer:

is this a joke or riddle or is this a real question sry?

Step-by-step explanation:

Answer:

first one

Step-by-step explanation:

because they have 2 angles the same and a side by reflexive property

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

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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...

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Answer:

b) $120 , $ 80

Step-by-step explanation:

Ratio = 3 :2

Total = 3 + 2 = 5

3/5 of 200 = [tex]\frac{3}{5}*200[/tex]

                  = 3 * 40

                  = $ 120

2/5 of 200 = [tex]\frac{2}{5}*200[/tex]

                 = 2 * 40

                  = $ 80