A top swimmer would be able to swim across a 25-meter pool in about 1/5
of a minute. How fast can a top swimmer go?

Answer:

A). Using dependent samples with paired data is generally better than using two independent samples.

Explanation:

Observational studies is the research/study design in which the investigator observes the samples collected from the population in their natural pattern to make valid inferences without any kind of manipulation or interference. While the experimental studies involves a controlled or manipulated variable in order to check its impact over the independent variable and the relation between the two.

As per the question, the design principle that is emphasized for both the studies would be 'employing dependent samples along with the paired data is usually effective than employing two independent samples' as the former concerns one set of elements that makes them 'self-evident'(as the subjects of one sample can be employed to determine the subjects of other). Thus, option A is the correct answer.

Answer:

B

Step-by-step explanation:

Khan

help a sistah, follow their instah: emventures666

plz give brainliest oh wait nevermind-

Answer:

The answer is B

Step-by-step explanation:

I just got it right

Answer:

A.

Step-by-step explanation:

In the attached file

Answer:

2268mm^3

Step-by-step explanation:

To find the volume of the whole shape, an easier way would be to find the volume of each seperate prism and add them together.

The top/smaller prism has dimensions of 4mm x 3mm x 9mm.

Multiply together and you get (4mm x 3mm) x 9mm = 12mm x 9mm = 108mm

The bottom/bigger prism has the dimensions of 12mm x 9mm x 20mm

Multiply together and you get (12mm x 9mm) x 20mm = 108mm X 20mm = 2160mm

Add 108mm + 2160mm and you get the final volume of 2268mm^3

*Because you're working with volume you always add a ^3 after your measurement (units cubed)

Answer:

105/13 = x ; 64/13 = y

Step-by-step explanation:

12x + 2 = y + 94  --> 24x + 4 = 2y + 188

11x + 12 = 2y + 91 -->

13x - 8 = 97 -->

13x = 105 -->

105/13 = x -->

64/13 = y

[tex]A^2=2I[/tex]

Recall that [tex]I=AA^{-1}=A^{-1}A[/tex], so

[tex]A^2=2(A^{-1}A)[/tex]

Multiply on the right by [tex]A^{-1}[/tex] and regroup terms:

[tex]A^2A^{-1}=2(A^{-1}A)A^{-1}[/tex]

[tex]A(AA^{-1})=2A^{-1}(AA^{-1})[/tex]

[tex]A=2A^{-1}[/tex]

and finally solve for [tex]A^{-1}[/tex]:

[tex]\boxed{A^{-1}=\dfrac12A}[/tex]

Answer:

C. F(x) = [tex]4x^2 + 1[/tex]

Step-by-step explanation:

The altered function on the graph has shifted upwards by 1 unit from a +1. It also got narrower, and this is from a number that's greater than 1 in front of x.

Answer:

The angle of elevation is about 27°

Step-by-step explanation:

Let's view this case in the form of a right angled triangle. With the original height as the opposite side to the elevation angle and the shadow length as the adjacent side.

Let x represent the original height

2x is the length of shadow

And θ the angle of elevation

Applying trigonometry;

Tan θ = opposite/adjacent = original height/shadow length

Substituting the values;

Tan θ = x/2x

Tan θ = 1/2

θ = taninverse(1/2)

θ = 26.56505117707

θ ≈ 27°

Elevation angle is approximately 27°

Step-by-step explanation:

diameter = 2 * radius

= 2 * 44

= 88 cm (ANS)

Answer:

The diameter will be 88cm (Not a guess :P)

Step-by-step explanation:

So since we know that the radius is half the diameter we simply multiply 44*2 to get 88 as our diameter

Not hard, right? :P

Hope this helped! :)

Brainiest is most appreciated if possible

Sorry for any mistake that I made in advance

The options to the questions are:

A.  Taking on a job can cut into study time

B.  Paying with credit cards can end up conting more money

C.  Paying with additional loans can lead to connections and opportunities

D.  Taking on a job can make connections that lead to opportunities

Answer:

C.  Paying with additional loans can lead to connections and opportunities

Step-by-step explanation:

When faced with needing additional money during college, an individual may chose to take on job so to get extra money to finance his or her needs. However, such venture often leads to redcution in study time, as working on jobs will also needs it own time of execution.

Also, paying for financial needs during college days with credit card can lead to counting more money on the card. This implies that one can accumulate credit card rewards which can be in form of cashback, or points from certain purchases when using credit card.

More so, taking a job during college days, will definitely brings connections with different people, and thereby leads to opportunities.

However, paying with additional loans will never lead to connections and opportunities, but rather more debt, that the debtor will have to pay, which may take months or years. And it can only be a burden on the debtor.

Hence, when faced with needing additional money during college the option that is NOT true is Paying with additional loans can lead to connections and opportunities

Answer:

B. Brand B

Step-by-step explanation:

[tex]\left|\begin{array}{cccc}$Brand&$Total Sold&$Returns&$Probability of Returns\\---&---&---&---\\$Brand A&343&17&\dfrac{17}{343}=0.0496 \\\\$Brand B&180&14&\dfrac{14}{180}=0.0778 \\\\$Brand C&383&16&\dfrac{16}{383}=0.0418\\\\$Brand D&246&8&\dfrac{8}{246}=0.0325\\&&&\end{array}\right|[/tex]

We can see from the table above that the experimental probability of returns of Brand B is the highest, therefore it has the highest likelihood of being returned.

The store should consider eliminating Brand B.

Answer:

Step-by-step explanation:

Answer:

48 Inches

Step-by-step explanation:

The diagonal of the TV = 60 Inches

Height of the Screen =36 Inches

We are to determine the actual width of the screen.

This TV across the diagonal forms a right triangle in which the diagonal is the hypotenuse.

We therefore use the Pythagorean Theorem to solve for the width of the screen.

Pythagorean Theorem: [tex]Hypotenuse^2=Opposite^2+Adjacent^2[/tex]

Let w be the width of the television

[tex]60^2=36^2+w^2\\w^2=60^2-36^2\\w^2=2304\\w=\sqrt{2304}\\ $Width of the television, w=48 inches[/tex]

Answer:

Tuesday may 18 2020

Step-by-step explanation:

Answer:

The vale of x is 3/5.

Step-by-step explanation:

First you have to expand out :

[tex]2(5x - 3)[/tex]

[tex] = 2(5x) - 2(3)[/tex]

[tex] = 10x - 6[/tex]

Next you have to solve it by adding 6 to both sides :

Let expression = 0,

[tex]10x - 6 = 0[/tex]

[tex]10x - 6 + 6 = 0 + 6[/tex]

[tex]10x = 6[/tex]

[tex]x = \frac{6}{10} [/tex]

[tex]x = \frac{3}{5} [/tex]

Answer: Greater than 5

Step-by-step explanation:

The quotient of 5 and .5 is 10.

5/0.5 = 10

Whenever you divide a whole number by a fraction, the quotient will always be larger than the whole number

Answer:

48/70 or24/35

Step-by-step explanation:

9/7-6/10 u find the LCD or lowest common denominator. 90/70-42/70=48/70=24/35

Answer:

24/35

Step-by-step explanation:

9/7 - 6/10

Simplify 6/10 by dividing the top and bottom by 2

9/7 - 3/5

The common denominator is 7*5 = 35

9/7 * 5/5    - 3/5 *7/7

45/35 - 21/35

24/35

Answer:

(0,0)

Step-by-step explanation:

I think thats the only answer because the line goes through that point.

Answer: U = 8w-16/-12

Step-by-step explanation:

-12u + 13 = 8w -3

-12u + 13 - 13 = 8w -3 -13

-12u = 8w -16

u = 8w - 16/ -12

Answer:

Correct option A: 0.6874

Step-by-step explanation:

Hello!

To calculate the area within the interval [-1.23; 0.83], you have to subtract to the probability accumulated till the lower value to the probability accumulated to the higher value, symbolically:

P(Z≤0.83)-P(Z≤-1.23)

You have to use the Z table to look for the corresponding values of probability. The negative value is in the left entry and the positive value is in the right entry. The first column shows the integer and first decimal value, the second decimal value is in the first row, you cross both values and find the value of probability.

P(Z≤0.83)-P(Z≤-1.23)= 0.7967 - 0.1093= 0.6874

I hope it helps!

Answer:

22years

Step-by-step explanation:

The sum of ages of people in the room is 40 * 5= 200

[ Remember mean = total ahead of people/ number of people]

Let the age of the 6th person be X

200+x. / 6 = 37

200 + x = 37 * 6 = 222

x = 222- 200 = 22

Answer:

the correct answer for 9 is A) N 3-

Step-by-step explanation:

Answer:

(3,5)

Step-by-step explanation:

in order to reflect over an axis, you put a negative in front of the opposite axis's coordinate.

in this case, you reflect over the y axis so you put a negative in front of the x coordinate. (--3,5) two negatives make a positive so you get (3,5)

If your'e going to ask a question here, you might as well just use a coordinate plane

If my answer helps, please give me brainliest, it helps a lot

Answer:

(3,5)

Step-by-step explanation:

Answer:

Square feet of Carpeting : 136 ft^2

Step-by-step explanation:

Let us divide this figure into two shapes, each being rectangles;

Considering the first, smaller shape, with a given dimension of 7 feet we can see that the second dimensions is 13 - 9, ⇒ 4 feet

The Area of this part would thus be ⇒ 7 * 4 = 28 ft^2

Now this second figure is provided with dimensions 12 by 9 feet, so that the  area would, by definition ⇒ length * width = 12 * 9 ⇒ 108 ft^2. The total area of this figure is, by Partition Postulate : 108 + 28 ⇒ 136 square feet

If Sara plans to carpet the room, clearly the carpeting's area should be equivalent to that of the area of the room. This would mean;

Square feet of Carpeting : 136 ft^2

Answer:

 gvuhgvcgv  

Step-by-step explanation:

hvhjbkuijbg

Answer:

[tex]z=\frac{0.191 -0.2}{\sqrt{\frac{0.2(1-0.2)}{6967}}}=-1.878[/tex]  

Now we can find the p value using the alternative hypothesis and with the following probability:

[tex]p_v =P(z<-1.878)=0.0302[/tex]  

We see that the p value is higher than the significance level of 0.01 so then we FAIL to reject the null hypothesis and there is NOT enough evidence to conclude that the return rate is less than​ 20% at 1% of significance

Step-by-step explanation:

Information given

n=6967 represent the random sample selected

X=1331 represent the surveys returned

[tex]\hat p=\frac{1331}{6967}=0.192[/tex] estimated proportion of return rate

tex]p_o=0.2[/tex] is the value to verify

[tex]\alpha=0.01[/tex] represent the significance level

z would represent the statistic

[tex]p_v[/tex] represent the p value

System of hypothesis

We test the claim that the return rate is less than​ 20%, then the system of hypothesis are:  

Null hypothesis:[tex]p\geq 0.2[/tex]  

Alternative hypothesis:[tex]p < 0.2[/tex]  

The statistic is given by:

[tex]z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}[/tex] (1)  

Replacing the info given we got:

[tex]z=\frac{0.191 -0.2}{\sqrt{\frac{0.2(1-0.2)}{6967}}}=-1.878[/tex]  

Now we can find the p value using the alternative hypothesis and with the following probability:

[tex]p_v =P(z<-1.878)=0.0302[/tex]  

We see that the p value is higher than the significance level of 0.01 so then we FAIL to reject the null hypothesis and there is NOT enough evidence to conclude that the return rate is less than​ 20% at 1% of significance

Answer:

residual cost = $24.57

Step-by-step explanation:

The residual is the difference between the observed value of y and the predicted value of y. The least square regression equation was used to predict cost in dollars per barrel of jet fuel  from the cost , in dollars ,per barrel of crude oil. The residual value is the difference between the observed or measured value and the predicted value of  the regression model . The predicted value is gotten from the regression equation.

y = 2 + 6/7 x

where

x = cost of a barrel of crude oil

x = $60

y = 2 + 6/7 × 60

y = 2 + 360/7

y = 2 + 51.4285714286

y = 53.4285714286

y = $53. 43

predicted cost = $53. 43

Measured cost  = $78

residual = observed value - predicted value

residual = 78 - 53.43

residual cost = $24.57

The residual of a week in which a barrel of crude oil costs $60 and a barrel of jet fuel costs $78 is $24.57

The residual value is the difference between the observed or measured value and the predicted value of the regression model.

Given that a barrel of crude oil costs $60 and a barrel of jet fuel costs $78.

According to the question, we have;

y = 2 + 6/7 x

where x = the cost of a barrel of crude oil

x = $60

Substitute;

y = 2 + 6/7 × 60

y = 2 + 360/7

y = 2 + 51.4285714286

y = 53.4285714286

y = $53. 43

The predicted cost is $53. 43

Measured cost  = $78

Then the residual = observed value - predicted value

The residual = 78 - 53.43

Residual cost = $24.57

Hence, the residual of a week in which a barrel of crude oil costs $60 and a barrel of jet fuel costs $78 is  $24.57

Learn more about equations here;

https://brainly.com/question/10413253

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The complete question is

The residual is the difference between the observed value of y and the predicted value of y. The least square regression equation was used to predict the cost in dollars per barrel of jet fuel from the cost, in dollars, per barrel of crude oil. The predicted value is gotten from the regression equation. What is the residual of a week in which a barrel of crude oil costs $60 and a barrel of jet fuel costs $78?

Answer:

2

Step-by-step explanation:

Well if 2 are red it can only be either

rrrr

or

rrrw

Answer:

  If the integer is in the range 1–15, then the weather could be declared rainy

Step-by-step explanation:

Assuming the integers are uniformly distributed 15 of them will constitute 30% of the possible integer. If the integer is in the range 1–15, then the weather could be declared rainy. That would make the probability of rain 30%, as required.

Answer:

an=n+2

Step-by-step explanation: