The is 2/3 of a pizza left. Wakami eats 1/4 of it. How much of the pizza did he eat?

Answer:

the answer is 7.5. hope this helps

Answer:

7.5

Step-by-step explanation:

Answer:

(a) 99% confidence interval for the percentage of girls born is [0.804 , 0.896].

(b) Yes​, the proportion of girls is significantly different from 0.50.

Step-by-step explanation:

We are given that a clinical trial tests a method designed to increase the probability of conceiving a girl.

In the study 400 babies were​ born, and 340 of them were girls.

(a) Firstly, the pivotal quantity for 99% confidence interval for the population proportion is given by;

                    P.Q. =  [tex]\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex]  ~ N(0,1)

where, [tex]\hat p[/tex] = sample proportion of girls born = [tex]\frac{340}{400}[/tex] = 0.85

             n = sample of babies = 400

             p = population percentage of girls born

Here for constructing 99% confidence interval we have used One-sample z proportion statistics.

So, 99% confidence interval for the population proportion, p is ;

P(-2.58 < N(0,1) < 2.58) = 0.99  {As the critical value of z at 0.5% level

                                                    of significance are -2.58 & 2.58}  

P(-2.58 < [tex]\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex] < 2.58) = 0.99

P( [tex]-2.58 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex] < [tex]{\hat p-p}[/tex] < [tex]2.58 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex] ) = 0.99

P( [tex]\hat p-2.58 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex] < p < [tex]\hat p+2.58 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex] ) = 0.99

99% confidence interval for p = [[tex]\hat p-2.58 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex] , [tex]\hat p+2.58 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex]]

= [ [tex]0.85-2.58 \times {\sqrt{\frac{0.85(1-0.85)}{400} } }[/tex] , [tex]0.85+2.58 \times {\sqrt{\frac{0.85(1-0.85)}{400} } }[/tex] ]

 = [0.804 , 0.896]

Therefore, 99% confidence interval for the percentage of girls born is [0.804 , 0.896].

(b) Let p = population proportion of girls born.

So, Null Hypothesis, [tex]H_0[/tex] : p = 0.50      {means that the proportion of girls is equal to 0.50}

Alternate Hypothesis, [tex]H_A[/tex] : p [tex]\neq[/tex] 0.50      {means that the proportion of girls is significantly different from 0.50}

The test statistics that will be used here is One-sample z proportion test statistics;

                               T.S. = [tex]\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }[/tex]  ~ N(0,1)

where, [tex]\hat p[/tex] = sample proportion of girls born = [tex]\frac{340}{400}[/tex] = 0.85

             n = sample of babies = 400

So, the test statistics  =  [tex]\frac{0.85-0.50}{\sqrt{\frac{0.85(1-0.85)}{400} } }[/tex]

                                     =  19.604

Now, at 0.01 significance level, the z table gives critical value of 2.3263 for right tailed test. Since our test statistics is way more than the critical value of z as 19.604 > 2.3263, so we have sufficient evidence to reject our null hypothesis due to which we reject our null hypothesis.

Therefore, we conclude that the proportion of girls is significantly different from 0.50.

To construct a 99% confidence interval for the percentage of girls born, calculate the sample proportion and use it to construct the confidence interval. The method appears to be effective.

To construct a 99% confidence interval for the percentage of girls born, we first need to calculate the sample proportion. In this case, the sample proportion of girls is 340/400 = 0.85. Using this proportion, we can construct the confidence interval using the formula.

Confidence Interval = sample proportion ± z x √((sample proportion x (1 - sample proportion)) / sample size). Calculating the confidence interval, we find that it is 0.808 to 0.892. Since this interval does not include the value of 0.5, the method appears to be effective.

https://brainly.com/question/34700241

#SPJ6

(2, -6) is the center of the circle.

To find the center of the circle, we need to rewrite the given equation in standard form:

[tex]x^2 - 4x + y^2 + 12y = 24[/tex]

We can complete the square to put it into the standard form:

[tex]x^2 - 4x + 4 + y^2 + 12y + 36 = 24 + 4 + 36\\\\(x - 2)^2 + (y + 6)^2 = 64[/tex]

Now we can see that the center of the circle is (2, -6).

Learn more about coordinates here:

https://brainly.com/question/20282507

#SPJ1

The center of the circle represented by the equation x^2 + y^2 −4x +12y−24=0 is (2, -6), which is determined by completing the square for both x and y terms.

To determine the center of a circle given by the equation x^2 + y^2 −4x +12y−24=0, we need to complete the square for both the x and y terms.

Step 1: Rearrange the equation by grouping x terms and y terms together: x^2 −4x + y^2 +12y = 24.

Step 2: Complete the square for the x terms and y terms: (x^2 −4x + 4) + (y^2 +12y + 36) = 24 + 4 + 36.

Step 3: Simplify the equation: (x − 2)^2 + (y + 6)^2 = 64.

Step 4: In the standard form of a circle equation, (x − h)^2 + (y − k)^2 = r^2, the center is at (h, k). Therefore, the center of the given circle is (2, -6).

Answer: 10

Step-by-step explanation: because you subtract it by 10

20-10= 10

Answer:

search on google

Step-by-step explanation:

Answer:

lower interval = -1.715

upper interval = 7.715

Step-by-step explanation:

The 95% confidence interval for the difference in mean number of units of the appliance sold at all retail stores for this case is  [-1.667, 7.667]

Supposing the samples are large, let we're given that:

For first sample:

For second sample:

Suppose the confidence level be p% = p/100 in decimal, then the level of significance would be [tex]\alpha = 1 - p/100[/tex]

Then, the margin of error would be:

[tex]MOE = Z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1} + \dfrac{s_2^2}{n_2}}[/tex]

where [tex]Z_{\alpha/2}[/tex] is the critical value of Z at level of significance [tex]\alpha[/tex]

The confidence interval would be:

[tex]CI = \overline{x}_1 - \overline{x}_2 \pm MOE[/tex]

Thus, for this case, we're specified that:

For first sample (SRS this month):

For first sample(SRS last month):

Level of significance = 1 - 95/100 = 0.05

The critical value of z at 0.05 level of significance (from the tables of critical value of Z) is: [tex]Z_{0.05/2} = 1.96[/tex]

Thus, the margin of error would be:

[tex]MOE = Z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1} + \dfrac{s_2^2}{n_2}}\\\\\\MOE = 1.96\sqrt{\dfrac{11^2}{50} + \dfrac{13^2}{52}}\\\\MOE \approx 4.667[/tex]

Thus, the confidence interval would be:

[tex]CI = \overline{x}_1 - \overline{x}_2 \pm MOE\\CI \approx 41 - 38 \pm 4.667\\CI \approx 3 \pm 4.667\\CI \approx [3 - 4.667, 3 + 4.667] = [-1.667, 7.667][/tex]

Thus, the 95% confidence interval for the difference in mean number of units of the appliance sold at all retail stores for this case is  [-1.667, 7.667]

Learn more about confidence interval for difference in mean of two samples here:

https://brainly.com/question/12694093

Answer:

694 cubic inches

Step-by-step explanation:

Dimension of prism

Length = 15.5 inches

width =  8 inches

height =  7 inches

Volume of regular prism is given  by area of base * height

area of base  = length * width ( as bin is rectangular)

area of base  = 15.5 * 8 square inches = 124 square inches

Volume of regular prism = area of base * height

      = 124 * 7 cubic inches = 868 cubic inches

_________________________________________________

868 cubic inches is the full capacity of the recycling bin

it is given that recycling bins need to be emptied when it is 80% full

so we need to find the 80% capacity of recycling bin

80% capacity of recycling bin = 80/100 *  full capacity of the recycling bin

                  = 0.8 * 868 cubic inches = 694.4 cubic inches

694.4 cubic inches is the amount needed before the recycle bin is ready to empty .

But question says answer should in nearest cubic inch

hence answer is 694 cubic inches

Answer:

Step-by-step explanation:

The independent variable is time (t), determining the distance covered.

The point (12, 4) means Noah walks for 12 hours, covering 4 miles.

To find time for 7[tex]\frac{1}{2}[/tex] miles,  [tex]\frac{1}{3}d = t \),[/tex] Substitute 7.5 for d, yielding [tex]\( \frac{1}{3} 7.5 = t \) = 2.5 hour[/tex]. So, (2.5, 7.5) represents Noah taking 2.5 hours to walk 7[tex]\frac{1}{2}[/tex] miles.

1. **Identify the independent variable**:

In the equation [tex]\( \frac{1}{3}d = t \),[/tex] the independent variable is time (t). The independent variable is the one that stands alone and is not dependent on other variables. In this case, time (t) is independent as it determines the distance covered (d).

2. **What does the point (12, 4) represent in this situation**:

  The point (12, 4) represents a specific instance in the relationship between time and distance. In this case, it means that when Noah walks for 12 hours, he covers a distance of 4 miles. This point is a solution to the equation  [tex]\( \frac{1}{3}d = t \),[/tex] where 12 hours corresponds to the time (t) and 4 miles corresponds to the distance (d).

3. **What point would represent the time it took to walk 7 1/2 miles**:

  To find the point representing the time it takes to walk 7 1/2 miles, we substitute 7.5 miles into the equation and solve for time (t). First, we rewrite the equation without fractions to make the calculation simpler:

[tex]\[ \frac{1}{3}d = t \][/tex]

[tex]\[ \frac{1}{3} \times d = t \][/tex]

[tex]\[ \frac{1}{3} \times 7.5 = t \][/tex]

 Now, we simply multiply 1/3 by 7.5:

[tex]\[ t = \frac{1}{3} \times 7.5 \][/tex]

[tex]\[ t = 2.5 \][/tex]

  So, the time it takes to walk 7[tex]\frac{1}{2}[/tex] miles is 2.5 hours. Therefore, the point representing this situation is (2.5, 7.5), indicating Noah takes 2.5 hours to walk 7.5 miles. This point satisfies the equation [tex]\( \frac{1}{3}d = t \)[/tex], where 2.5 hours corresponds to the time (t) and 7.5 miles corresponds to the distance (d).

In summary, the independent variable in this situation is time (t), the point (12, 4) represents Noah walking for 12 hours and covering 4 miles, and the point (2.5, 7.5) represents Noah taking 2.5 hours to walk 7[tex]\frac{1}{2}[/tex] miles.

Answer:

0.1574 = 15.74% of the​ player's serves are expected to be between 116 mph and 146 ​mph

Step-by-step explanation:

Problems of normally distributed(bell-shaped) samples are solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

[tex]\mu = 101, \sigma = 15[/tex]

What proportion of the​ player's serves are expected to be between 116 mph and 146 ​mph?

This is the pvalue of Z when X = 146 subtracted by the pvalue of Z when X = 116. So

X = 146

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{146 - 101}{15}[/tex]

[tex]Z = 3[/tex]

[tex]Z = 3[/tex] has a pvalue of 0.9987

X = 116

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{116 - 101}{15}[/tex]

[tex]Z = 1[/tex]

[tex]Z = 1[/tex] has a pvalue of 0.8413

0.9987 - 0.8413 = 0.1574

0.1574 = 15.74% of the​ player's serves are expected to be between 116 mph and 146 ​mph

To find the proportion of the player's serves between 116 mph and 146 mph, calculate the z-scores and use a z-table.

To find the proportion of the player's serves between 116 mph and 146 mph, we need to calculate the z-scores for these values and then use a z-table.

The formula for calculating the z-score is z = (x - mean) / standard deviation. So, for 116 mph: z = (116 - 101) / 15 = 1; and for 146 mph: z = (146 - 101) / 15 = 3.

The z-score of 1 corresponds to a cumulative proportion of 0.8413 and the z-score of 3 corresponds to a cumulative proportion of 0.9987. So, the proportion of serves between 116 mph and 146 mph is 0.9987 - 0.8413 = 0.1574, rounded to four decimal places.

https://brainly.com/question/31541178

#SPJ3

Answer:

the 3rd one

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

because it has too many on one side

Answer:

A =42.9866 in^2

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

The radius is 3.7

A = pi (3.7)^2

Approximating pi by 3.14

A = 3.14 (3.7)^2

A =42.9866

Answer:

The area, in square inches, of the circle is 43.01.

Answer:

2/3

Step-by-step explanation:

To find the slope take the difference of the y's over the difference of the x's

(8-6)/ (12-9)

2/3

Answer:

159

Step-by-step explanation:

Answer:

159

Step-by-step explanation:

Answer:

1).

7, rational

2).

2.36 (repeating), irrational

3).

[tex]Simplify:\frac{734}{1000} / \frac{2}{2} = \frac{367}{500}[/tex]

4).

[tex]Simplify: \frac{2588}{1000} /\frac{4}{4} =\frac{647}{250} \\If.you.want.to.convert.it.to.a.mixed.fraction: 2\frac{147}{250}[/tex]

Answer:

1.88 minutes

Step-by-step explanation:

This question can be solved using speed, distance and time concept along-with use of computing fractions.

Given

Distance ran by Kirby = 3/4 of half mile

                                    = 3/4 of 1/2 mile = 3/4 * 1/2 mile = 3/8 mile.

Speed of Kirby until she dropped out of race = 12 miles/hour

Formula to calculate time = Distance/Time

substituting value of speed of Kirby and distance covered by Kirby

Time = [tex](3/8) / 12 = 3/(8*12) = 1/32 \ hour[/tex]

Since one hour has 60 minutes 1/32 hour = (1/32) * 60 minutes = 1.88 minutes

Answer:

88x+4y+7z+6

Step-by-step explanation:

depends on how u write it take a pic next time please

Answer:

You did not provide any function...therefore, i cant give you a proper answer.

Step-by-step explanation:

Answer:

-9

0

3

Step-by-step explanation:

-(-2-1)^2

-(1-1)^2

x>2 , so g(x) = 3

Answer:

[tex] Y =\frac{16.5}{1.5}= 11[/tex]

[tex] X = 18-11=7[/tex]

And then we conclude that for the first job he works 7 hours and for the second job 11 hours

Step-by-step explanation:

We can define the following notation:

[tex]X[/tex] represent the number of hours worked for one job

[tex]Y[/tex] represent the number of hours worked for the other job

[tex]p_x = 9[/tex] represent the hourly payment for the first job

[tex]p_y = 7.50[/tex] represent the hourly payment for the other job

And we can define the following equations:

[tex] X+ Y= 18[/tex]   (1) represent the toal number of hours worked

[tex] 9X +7.5 Y = 145.50[/tex]  (2) represent the total amount earned

From equation (1) if we solve for X we got:

[tex] X = 18-Y[/tex] (3)

Replacing equation (3) into equation (2) we got:

[tex] 9(18-Y) +7.5 Y =145.50[/tex]

And after solve the equation we can find the value of Y:

[tex] 162 -9Y +7.5 Y =145.50[/tex]

[tex]16.5 = 1.5 Y[/tex]

[tex] Y =\frac{16.5}{1.5}= 11[/tex]

And solving for X from equation (3) we got:

[tex] X = 18-11=7[/tex]

And then we conclude that for the first job he works 7 hours and for the second job 11 hours

Answer:

B. It is too risky to use credit cards online, and online payment services have better security because of the increasing number of hackers that may steal money from your bank account.

Step-by-step explanation:

Answer:

The answer is C.

Step-by-step explanation:

I just took the test on edg and got a 100

The function is linear but is not a direct variation.

Direct variations are defined as the functions of the form y = kx, where k is a constant.

Here when y increases, x increases and if y decreases, x also decreases.

Given is a function that passes through three points (18, 30), (14, 24) and (10, 18).

If the function is linear, the the slope must be constant.

Slope = Change in y coordinates / Change in x coordinates

Consider (18, 30) and (14, 24).

Slope = (24 - 30) / (14 - 18) = -6 / -4 = 3/2

Consider (14, 24) and (10, 18).

Slope = (18 - 24) / (10 - 14) = 3/2

Since slope is constant, function is linear.

Let y = mx + c be the equation of the function, where m is the slope and c is the y intercept.

If the function is direct variation, c = 0.

Substitute (10, 18) in to the equation.

18 = (3/2 × 10) + c

⇒ c = 3

It is not direct variation.

Hence the function is linear but is not a direct variation.

Learn more about Direct Variation here :

https://brainly.com/question/13468253

#SPJ7

Answer:

The correct answer to the following question will be "32 servings".

Step-by-step explanation:

The given values are,

A bag of chips = 24 ounces

Serving size = 3/4 ounces

Servings = ?

Now,

On dividing "24 ounces" by "3/4 ounce", we get

⇒  [tex]\frac{24}{\frac{3}{4}}[/tex]

⇒  [tex]24\times \frac{4}{3}[/tex]

⇒  [tex]8\times 4[/tex]

⇒  [tex]32[/tex]

Thus, the bag of chips contains "32" servings.

Final answer:

To determine the number of servings in a 24-ounce bag of chips with a serving size of 3/4 ounce, divide the total weight by the serving size, resulting in 32 servings.

Explanation:

The student has asked a question about how to calculate the number of servings in a bag of chips given its total weight and the size of each serving. This is a mathematics problem involving division.

To find out the number of servings in a 24-ounce bag of chips where each serving is 3/4 ounce, you divide the total weight of the bag by the weight of a single serving:

Number of servings = Total weight of the bag / Weight of one serving

Number of servings = 24 oz / (3/4 oz)

To divide the fractions, you multiply by the reciprocal of the serving size, which is:

Number of servings = 24 oz × (4/3)

Number of servings = 32

Therefore, there are 32 servings in the 24-ounce bag of chips.

Answer:

s≥16

Step-by-step explanation:

3s+52≥100

3s≥100-52

3s≥48

s≥48/3

s≥16

The solution to the inequality is x ≥ 16.

It shows a relationship between two numbers or two expressions.

There are commonly used four inequalities:

Less than = <

Greater than = >

Less than and equal = ≤

Greater than and equal = ≥

We have,

Let x be the number of sales you need to make.

The total pay you receive will be $52 + $3x.

Since you want your pay to be at least $100, we can write the inequality:

52 + 3x ≥ 100

Solving for x, we get:

3x ≥ 48

x ≥ 16

Therefore,

The solution to the inequality is x ≥ 16.

This means that you need to make at least 16 sales to earn at least $100 this week.

Learn more about inequalities here:

https://brainly.com/question/20383699

#SPJ2

Answer:

38 units

Step-by-step explanation:

VS = TS

39 = 6x – 3

39 + 3 = 6x

42 = 6x

X = 7  

TV = 2(VR)

TV = 2 ( 2(7) + 5)

TV = 38 units

Brainiest please?

answer is POSITIVE 26,

Step-by-step explanation:

because when you add positive 11 to get zero, you just need to add positive 15 to get POSITIVE 15

Answer:

You have to make them equal first. Start with that.

1/8  --> 3/24

1/6 ---> 4/24

1/3  --> 8/24

Now, order them.

1/8, 1/6. 1,3

Answer:

  80/99

Step-by-step explanation:

When the repeat starts at the decimal point, put the digits over an equal number of 9s.

  [tex]0.\overline{80}=\boxed{\dfrac{80}{99}}[/tex]

This fraction cannot be reduced.

Final answer:

To convert the repeating decimal 0.80 (with 80 repeating) to a fraction, set up an equation where x equals the repeating decimal, then multiply by 10 and subtract the original equation to eliminate the repeating part, and solve for x to get 8/9.

Explanation:

The number 0.80 with 80 repeating is often represented as 0.8 with a line over the 8, indicating that the 8 is repeating indefinitely. To convert 0.80 repeating to a fraction, we can use the following method:

Let x equal the repeating decimal: x = 0.888...

Multiply both sides by a power of 10 to move the decimal point to the right of the repeating digits. Here, we multiply by 10: 10x = 8.888...

Subtract the original equation from this new equation to get rid of the repeating decimal: 10x - x = 8 (9x = 8).

Now solve for x: x = 8/9.

Thus, 0.80 with 80 repeating as a fraction is 8/9.

Answer:

The correct answer would be C (-3, 7)

Step-by-step explanation:

The first coordinate is the x (-3) and the second is the y (+7); therefore, the coordinate of the fourth vertex on the plane is (-3, 7).

Answer:

your answer should be C (-3, 7)

Step-by-step explanation:

brainliest pls

Have a nice day

Answer:

$1,958.23

Step-by-step explanation:

Annual income = $67,525

Total FCIA = 15.3% of salary

Since my annual income is $67,525 the FCIA contribution = 15.3%.

But 12.4% is for Social Security.

The remaining 2.9%(15.3% - 12.4%) will be for Medicare taxes.

The total deduction for I and my employer for medicare taxes will be:

2.9% * $67,525

= $1,958.225

The total deduction for medicare would be: $1,958.23

Note: Assuming we were asked to calculate only employee's medicare, the deduction would be 50% of $1,958.23.

Answer:

1958

Step-by-step explanation: