81. Restaurants. About 12% of the restaurants in the US are pizzerias, and there are about 70,000 pizzerias in the US. Estimate the total number of restaurants in the United States.

Answer:

B) x < 22.5; Sam has fewer than 22.5 minutes left to finish running.

Step-by-step explanation:

For this case we have the following inequality:

From here, we define the variable x.

x: number of minutes remaining to finish the race.

From here, we clear the value of x.

We have then:

 Therefore, Samuel has less than 22.5 minutes to finish the race in the estimated time.

Answer:

x < 22.5; Sam has fewer than 22.5 minutes left to finish running.

x < 22.5; Sam has fewer than 22.5 minutes left to finish running.

For this case we have the following inequality:

From here, we define the variable x.

x = number of minutes remaining to finish the race.

From here, we clear the value of x.

We have then:

Therefore, Samuel has less than 22.5 minutes to finish the race in the estimated time.

The major examples of social inequality include income gap, gender inequality, health care, and social class. In health care, some individuals receive better and more professional care compared to others.

Learn more about inequality here: brainly.com/question/25275758

#SPJ2

Answer:

2

Step-by-step explanation:

a10=a1+(n-1)d

15=-3+(10-1)d

15+3=9d

d=2

78% means 78/100=0.78

Answer:

The probability that a randomly selected passenger has a waiting time greater than 2.25 minutes is P=0.68.

Step-by-step explanation:

For a uniform distribution, any value within the minimum and maximum value have the same probability. Outside that interval, the probability is 0.

Then, for a uniform distribution within a and b, the probability P(X>c), being z<c<b is:

[tex]P(X>c)=\dfrac{b-c}{b-a}[/tex]

For our case, with a uniform distribution within 0 and 7 minutes, the probability that a randomly selected passenger has a waiting time greater than 2.25 minutes is:

[tex]P(t>2.25)=\dfrac{7-2.25}{7-0}=\dfrac{4.75}{7}=0.68[/tex]

Answer:

Step-by-step explanation:

here ,

6x +238 = 3x+178 ( vertically opposite angles are equal)

so 6x - 3x = 178 -238

3x =-60

x =-60/3

x=-20

hope it helps / please mark me as the brainliest..

Answer:

x= -20

Step-by-step explanation:

The 2 angles are opposite each other. Therefore, they are vertical angles and congruent. We can set them equal to each other and solve.

6x+238=3x+178

To solve the equation, we want to find out what x is. In order to do this, we have to get x by itself. Perform the opposite of what is being done to the equation. Keep in mind, everything done to one side, has to be done to the other.

First, subtract 3x from both sides

6x-3x+238=3x-3x+178

6x-3x+238=178

3x+238=178

Next, subtract 238 from both sides

3x+238-238=178-238

3x=178-238

3x=-60

Finally, divide both sides by 3.

3x/3= -60/3

x=-60/3

x= -20

Answer:

A homeowner has to pay phone bill, home insurance, cable bill, internet bill

Step-by-step explanation:

If the homeowner doesn't pay these then they won't get to continue using it until they pay for it again.

Answer:

The answer should contain any four of the following:

utility fees

association fees

private mortgage insurance (PMI)

title insurance

homeowners insurance

property taxes

Step-by-step explanation: This is the PLATO answer.

Answer:

112m³

Step-by-step explanation:

VOLUME=L × W × H

= 4m × 12m × 3.5m

= 168m³

THE TANK IS FILLED TO 2/3 OF IT'S CAPACITY

= 2/3 × 168

= 112m³.

Answer:

y=-3/2x+12

Step-by-step explanation:

perpendicular lines their gradient multiply to form -1 thus gradient line 1=2/3

gradient line 2= -3/2

equation= y=mx+c where m represents gradient

y-(-6)/x-12=-3/2

y+6/x-12=-3/2

y+6=-3/2(x-12)

y+6=-3/2x+18

y= -3/2x+18-6

y=-3/2x+12

Answer:

3003 ways

Step-by-step explanation:

We are in a combination or permutation exercise, the difference between them is if the order matters (permutations) or does not matter (combinations),

in this case the order does not matter, since they only ask us for the ways to choose 10 of 15 roller coasters, therefore it would be a combination:

nCr = n! / (r! * (n-r)!

we know that n = 15 and r = 10, we replace:

15C10 = 15! / (10! * (15-10)!

15C10 = 3003

In other words, there are 3003 ways to choose 10 of the 15.

Answer: itz 780

Step-by-step explanation:

Answer:

PO = 20

Step-by-step explanation:

They are equidistant from the centre

PG = GO

x-4=1/2x+3

Multiplying both sides by 2

2(x-4)=x+6

2x-8=x+6

2x-x = 6+8

x = 14

Now

PO = 14-4+7+3

PO = 10+10

PO = 20

Answer:

21829787.23 joules

Step-by-step explanation:

The recycling will require 6%energy if initial energy, let's say x.

94% of x will be used to power a 100W TV for 3 hours

X = (100*3*60*60)/0.94

X = 1148936.17 joules.

To make 19 aluminum cans ,

It will take 1148936.17*19

= 21829787.23 joules

Answer:

4x^3 + 4x^2

Step-by-step explanation:

f(x) = 4x^2

g(x) = x + 1

=> (f.g)(x) = 4x^2*(x + 1) = 4x^3 + 4x^2

Hope this helps!

Answer:

$ 1,946.00  

Step-by-step explanation:

Average income per year=total income per month/12 months

total income=average income for first 4 months*4+ total income for 8 months

Let x represent total income total income for remaining 8 months

$1780.75=($1450.25*4+x)/12

$1780.75*12=$5,801+x

$21,369==$5,801+x

x=$21,369-$5,801

x=$15,568

The average income for the remaining eight months=x/8=$15568/8 =$1,946.00  

The average income for the remaining 8 months is $ 1,946.00  

Answer:

3 pack of hot dogs and 2 pack of buns 24

Step-by-step explanation:

hot dogs come in packs of 8

burns came in packs of 12

what is the least number of each you can buy in order to have a equal number of hot dogs and buns

so to get equal number

we have to look for the LCM of 8 and 12 = 24

therefore the packs will be equal to product

hot dogs come in packs of 8 = 8*3 = 24

burns came in packs of 12 = 12 *2 = 24

therefore, 3 pack of hot dogs and 2 pack of buns 24

Answer:

[tex]y = \frac{1}{2} x+1[/tex]

Step-by-step explanation:

Perpendicular => So, it will have a slope of a negative reciprocal to this slope

Slope = m = 1/2

Now,

Point = (x,y) = (0,1)

So, x = 0 and y = 1

Putting this in slope-intercept equation to get b

=> [tex]y = mx+b[/tex]

=> 1 = (1/2)(0) + b

=> b = 1

Now putting m and b in the slope intercept equation to get the required equation

=> [tex]y = \frac{1}{2} x+1[/tex]

Answer:

y = \frac{1}{2} x+1

Step-by-step explanation:

Answer:

We conclude that the proportion of only children in the special program is significantly different from the proportion for the school district.

Step-by-step explanation:

We are given that in a certain school district, it was observed that 24% of the students in the element schools were classified as only children

However, in the special program for talented and gifted children, 119 out of 415 students are only children.

Let p = proportion of only children in the special program.

So, Null Hypothesis, [tex]H_0[/tex] : p = 24%      {means that the proportion of only children in the special program is equal to the proportion for the school district}

Alternate Hypothesis, [tex]H_A[/tex] : p [tex]\neq[/tex] 24%     {means that the proportion of only children in the special program is significantly different from the proportion for the school district}

The test statistics that would be used here One-sample z-test for proportions;

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

where, [tex]\hat p[/tex] = sample proportion of only children in the special program = [tex]\frac{119}{415}[/tex] = 0.29

           n = sample of students = 415

The hypothesized population proportion for this test is 0.24.

So, the test statistics  =  [tex]\frac{0.29-0.24}{\sqrt{\frac{0.24(1-0.24)}{415} } }[/tex]  

                                     =  2.385

The value of z test statistic is 2.385.

Now, at 0.05 significance level the z table gives critical value of -1.96 and 1.96 for two-tailed test.

Since our test statistic doesn't lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that the proportion of only children in the special program is significantly different from the proportion for the school district.

Answer:

The p-value of the test is 0.0512.

Step-by-step explanation:

The p-value of a test is well-defined as per the probability, [under the null hypothesis (H₀)], of attaining a result equivalent to or more extreme than what was the truly observed value of the test statistic.

In this case the output of the t-test_ind method from scipy module is provided as follows:

Output = (-1.99, 0.0512)

The first value within the parentheses is the test statistic value.

So the test statistic value is, -1.99.

And the second value within the parentheses is the p-value of the test.

So the p-value of the test is 0.0512.

Question:

Match each term with its notation. Enter the number corresponding to the correct notation in the blank.

______:The number of treatment conditions

______:The number of scores in each treatment

______:The total number of scores in the entire study

______:The sum of the scores for each treatment condition

______:The sum of all of the scores in the research study

______:The F-ratio

1. G

2. k

3. N

4. T

5. n

6. F

Answer:

i) K :The number of treatment conditions

ii) n :The number of scores in each treatment

iii) N :The total number of scores in the entire study

iv) T :The sum of the scores for each treatment condition

v) G :The sum of all of the scores in the research study

vi) F :The F-ratio

Step-by-step explanation:

Here we are dealing with ANOVA notations.

ANOVA which is the short form for Analysis of Variance is a test in staristics used to compare two population samples to check if they are equal.

Here, we have the following ANOVA notations:

G, K, n, T, N, F

Where, G is said to be the sum of scores in the research study.

K is the number of treatment.

n is the number of scores in each treatment

T is the sum of scores for each treatment condition.

N is the total number of scores in whole study

F is the F-ratio.

Matching them with the terms given, we have the following:

i) K :The number of treatment conditions

ii) n :The number of scores in each treatment

iii) N :The total number of scores in the entire study

iv) T :The sum of the scores for each treatment condition

v) G :The sum of all of the scores in the research study

vi) F :The F-ratio

Note the difference between "N" and "n"

Answer:

(-3,0) (0,3) (1,4)

Step-by-step explanation:

Answer:

the two you selected and the last choice

(-3, 0)

(0, 3)

(1, 4)

Step-by-step explanation:

C. 1/5 chance that they boy did not see the movie.

Answer:

C.

Step-by-step explanation:

The answer is c. Probability has a formula it is, what we want/what we don't want. This means that we can use the table to calculate what the probability is that a randomly selected boy didn't see the movie.

1. 4/16

2. 1/4

Hope this helps! (Please consider giving brainliest)

Answer:

Step-by-step explanation:

We say that a function is differentiable if it's derivative exists and it is continous over the domain of the original function. Recall that the function |x| is given as |x| = x if [tex]x\geq 0[/tex] and |x|=-x if x<0. In both cases, we have either the function x or -x, which are one-degree polynomials. So, we can find easily their derivatives. So if f(x) = |x|. Then, we have that

[tex]f'(x) = (x)' = 1 \text{if } x\geq 0[/tex]

[tex]f'(x) = (-x)' = -1 \text{if } x<0[/tex]

We should check what happens x=0, since that is the point where the definition of f changes. We can check that

[tex]\lim_{x\to 0^+} f'(x) = 1[/tex] and

[tex]\lim_{x\to 0^-} f'(x) = -1[/tex]

since this limits are not equal, the derivative is not continous at x=0. Hence, the derivative doesn't exist at x=0.

In this case, we say that |x| is differentiable at any x different from 0.

Answer:

Best: 42/60 free throws

Second Best: 39/60 free throws

Third Best: 33/60 free throws

Step-by-step explanation:

Answer:

[tex]P(-2.05<X<-1.49)=P(\frac{-2.05-\mu}{\sigma}<\frac{X-\mu}{\sigma}<\frac{-1.49-\mu}{\sigma})=P(\frac{-2.05-0}{1}<Z<\frac{-1.49-0}{1})=P(-2.05<z<-1.49)[/tex]

And we can find this probability with this difference

[tex]P(-2.05<z<-1.49)=P(z<-1.49)-P(z<-2.05)=0.068- 0.0202= 0.0478[/tex]

And we can see the figure in the plot attached.

Step-by-step explanation:

Let X the random variable that represent the redings on thermometers of a population, and for this case we know the distribution for X is given by:

[tex]X \sim N(0,1)[/tex]  

Where [tex]\mu=0[/tex] and [tex]\sigma=1[/tex]

We are interested on this probability

[tex]P(-2.05<X<-1.49)[/tex]

We can use the z score formula given by:

[tex]z=\frac{x-\mu}{\sigma}[/tex]

Using this formula we got:

[tex]P(-2.05<X<-1.49)=P(\frac{-2.05-\mu}{\sigma}<\frac{X-\mu}{\sigma}<\frac{-1.49-\mu}{\sigma})=P(\frac{-2.05-0}{1}<Z<\frac{-1.49-0}{1})=P(-2.05<z<-1.49)[/tex]

And we can find this probability with this difference

[tex]P(-2.05<z<-1.49)=P(z<-1.49)-P(z<-2.05)=0.068- 0.0202= 0.0478[/tex]

And we can see the figure in the plot attached.

Answer:

24

Step-by-step explanation:

There are 4 options for the first reindeer.

After the first reindeer is selected, there are 3 options left for the second reindeer.

After the second reindeer is selected, there are 2 options left for the final reindeer.

The number of possible permutations is:

₄P₃ = 4×3×2 = 24

The easiest way to solve this problem is by calculating the areas of all the sides and adding them together.

Step 1; Calculate the area of the rectangular front & back

A = 2 * (l * w)

  = 2 * (25 * 10)

Step 2; Calculate the area of the rectangular sides

A = 2 * (1 * w)

  = 2 * (55 * 10)

= 1100 ft^2

Answer:

2.07 is the answer as of e.2020

Step-by-step explanation:

Step-by-step explanation:

lateral area=area of the full triangle

surface area=area of the four triangles + area of the square

Answer:

5x^2 -4

Step-by-step explanation:

f(x)= 4x^2+ 1

g(x) = x^2 - 5

(f+g)(x) = f(x) + g(x)

= 4x^2+ 1 + x^2 - 5

= 4x^2 + x^2 + 1- 5

= 5x^2 -4

Answer:

8.15% probability your hand contains exactly 3 hearts

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The order in which the cards are chosen is not important, so we use the combinations formula to solve this question.

Combinations formula:

[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

What is the probability your hand contains exactly 3 hearts (out of 5 cards)?

We have 52 cards in total.

13 are clubs, 13 are spades, 13 are hearts, 13 are diamonds.

Desired outcomes:

3 hearts, from a set of 13.

Other 2 cards, from a set of 52-13 = 39.

So

[tex]D = C_{13,3}*C_{39,2} = \frac{13!}{3!(13-3)!}*\frac{39!}{2!(39-2)!} = 211926[/tex]

Total outcomes:

5 cards, from a set of 52. So

[tex]T = C_{52,5} = \frac{52!}{5!47!} = 2598960[/tex]

Probabilities:

[tex]p = \frac{D}{T} = \frac{211926}{2598960} = 0.0815[/tex]

8.15% probability your hand contains exactly 3 hearts