estimate 4.68×69.8÷4.98×72.8​

Answer:

500

Step-by-step explanation:

percentage is the quantitative way to express number of things out of 100 things.

For example : 20% of bananas are ripe.

it means that if there are 100 apples, 20 are ripe.

Let the  total number of cupcakes sold that day be X

20% of total number of cupcakes sold = 20% of X = (20/100) * X __1

It is given that 20% of total number of cupcakes sold is equal to 100

Thus the equation 1 should be equal to 100.

Writing it mathematically we have

(20/100) * X = 100

=> 0.2X = 100

=> X = 100/0.2 = 500

500  cupcakes did the bakery sell that day.

Answer:

49

Step-by-step explanation:

x^2-14x+c

Take the coefficient of x

-14

Divide by 2

-14/2 = -7

Square it

(-7)^2

49

This is the number you add

Answer:

1. 3

2. 2

3. 6

Step-by-step explanation:

1. 3 * 3 = 9

2. 5 - 2 = 3

3. 3 + 6 = 9

Answer:

The answer is 9

Step-by-step explanation:

if u 170-125= 45 then u divide 5 into 45 and u get 9

Answer:

  -7

Step-by-step explanation:

l = kh . . . . . l is proportional to h with proportionality constant k

112 = k·(-16) . . . . . .  use the given numbers

k = -112/16 = -7  . . . divide by the coefficient of k

The constant of proportionality is -7.

Answer:

28 MEN

Step-by-step explanation:

X + X-3=59

2X-3=59

2X=62

X=31

MEN=31-3=28

Answer:

Center (- 5, - 6)

Radius 6 units

Step-by-step explanation:

x² + 10x + y² + 12y + 25 = 0

x² + 2*5*x + 5² + y² + 2*6*y + 6² - 5² - 6² + 25 = 0

(x + 5)² + (y + 6)² - 6² = 0

(x + 5)² + (y + 6)² = 6²

Center (- 5, - 6)

Radius 6 units

Answer:

  1.81530×10⁴

Step-by-step explanation:

Keep the first 6 digits of the mantissa:

  1.81530×10⁴

__

Here, the 7th digit is less than 5, so it and all to the right are dropped.

Answer:

X+8/100x ; X+0.08x

Step-by-step explanation:

Let x = last month's earning

8% =8/100 or 0.08

8/100 of x= 8/100x 008 of x=0.08x

last month + 8/100 of last month:

x+8/100x

last month + 0.08 of last month:

x+0.08x

Those are your two answers. I am sorry if they are wrong. I am not the best at math, but I tried supplying the answers as best as I could.

The mean of a set of numbers is the sum divided by the number of terms.

Answer: 22.9

Answer:

YOU ADD AND DIVIDE FOR THE MEAN

Step-by-step explanation:

add 20 + 20 + 20 + 22 + 22 + 24 + 26 + 26 + 26 equaling to = 206

divide by 9 equaling to = 22.88

Answer:

0.96 in^3

Step-by-step explanation:

Are those the only three choices? Anyway, I hope this helps

Answer:

[tex] \mu -2\sigma = 915.428 - 2* 22.87=869.69[/tex]

[tex] \mu +2\sigma = 915.428 + 2* 22.87=961.17[/tex]

And the best option would be:

4. Minimum: 869.69; maximum: 961.17

Step-by-step explanation:

We can assume that the variable of interst X is distributed with a binomial distribution and we can use the normal approximation.

For this case the mean would be given by:

[tex] E(X) = np = 2136 *(\frac{3}{7})= 915.428[/tex]

And the standard deviation would be:

[tex] \sigma = \sqrt{2136*(\frac{3}{7}) (1-\frac{3}{7})} =22.87[/tex]

And if we find the limits we got:

[tex] \mu -2\sigma = 915.428 - 2* 22.87=869.69[/tex]

[tex] \mu +2\sigma = 915.428 + 2* 22.87=961.17[/tex]

And the best option would be:

4. Minimum: 869.69; maximum: 961.17

Answer:

7 rounds

Step-by-step explanation:

After the 5th round, 8 divide by 2 equals 4. After the 6th round, 4 divided by 2 equals 2. After the 7th round, 2 divided by 2 equals 1 determining a winner. After every round, the number of people is decreased by dividing by 2.

Hope this helps!!! PLZ MARK BRAINLIEST!!! GG’s

Answer:

775 ml

Step-by-step explanation:

Answer:

775

Step-by-step explanation:

25 plus 50 equals 75.700 plus 75= 775 ml.

Answer:

Step-by-step explanation:

f(x) = x^2

reflect along the x-axis

g(x) = -x^2

expand vertilcally by a factor of 1/3

g(x) = (-1/3) x^2

move horizontally 4 units to the left

g(x) = (-1/3) (x+4)^2

hope this helps

Answer:

B. The graph of G(x) is the graph of F(x) stretched vertically, flipped over the x-axis, and shifted 4 units to the left.

Step-by-step explanation:

The [tex]\frac{-1}{3}[/tex] is less than one, making it stretch wider, and the (-) made it flip over the x-axis. The +4 in [tex](x+4)^2[/tex] made the function on the graph shift 4 units to the left.

This makes the correct answer be "B."

Answer:

predictive value of a positive test = 18.18%

predictive value of a negative test = 94.03%

Step-by-step explanation:

Sensitivity = 60% = 0.6

Specificity = 70% = 0.7

Let True Positive = TP

True Negative = TN

False Negative = FN

[tex]Sensitivity = \frac{TP}{TP + FN} \\0.6 = \frac{TP}{TP + FN} \\0.6TP + 0.6FN = TP\\0.4TP = 0.6FN\\TP = 1.5 FN[/tex]

[tex]Specificity = \frac{TN}{TN + FP} \\0.7 = \frac{TN}{TN + FP} \\0.7TN + 0.7FP = TN\\0.7FP = 0.3 TN\\TN = 7/3 FP[/tex]

Prevalence = 10% = 0.1

Three hundred people are screened, [tex]T_{total} = 300[/tex]

Total number of people having the disease, [tex]T_{disease} = ?[/tex]

[tex]Prevalence = \frac{T_{disease} }{T_{total} } \\0.1 = \frac{T_{disease} }{300 }\\T_{disease} = 30[/tex]

[tex]T_{disease} = TP + FN\\30 = TP + FN[/tex]

But TP = 1.5 FN

30 = 1.5 FN + FN

30 = 2.5 FN

FN = 30/2.5

FN = 12

TP = 1.5 FN = 1.5 * 12

TP = 18

[tex]FP + TN = T_{total} - T_{disease} \\FP + TN = 300 - 30\\FP + TN = 270\\FP + \frac{7}{3} FP = 270\\\frac{10}{3} FP = 270\\FP = 27 * 3\\FP = 81[/tex]

81 + TN = 270

TN = 189

To calculate the Predictive value of positive test (PPT)

[tex]PPT = \frac{TP}{TP + FP} * 100\\PPT = \frac{18}{18+81} * 100\\PPT = \frac{18}{99} * 100\\PPT = 18.18 \%[/tex]

To calculate the Predictive value of negative test (PNT)

[tex]PPT = \frac{TN}{FN + TN} * 100\\PPT = \frac{189}{189+12} * 100\\PPT = \frac{189}{201} * 100\\PPT = 94.03 \%[/tex]

Answer: your answer would be 5/16th :)

Answer:

5/16

Step-by-step explanation:

The common ratio is -5/2 / 5 = -1/2

Xn = 5 × (-1/2)^(n-1)

X5 = 5 × (-1/2)^(5-1)

X5 = 5 × (-1/2)^(4) = 5/16

Answer:

work is shown and pictured

Answer:

(st)(6)= s(6) * t(6)

Step-by-step explanation:

(st)(6)

(st)(x)= s(x) * t(x) we multiply it

(st)(6)= s(6) * t(6)

Hope this helps.

Answer:

Shown in the explanation below,

Step-by-step explanation

Mary had 1 3/4 pounds

Mary friend eat 3/4 blackberry which is

3/4. × 7/4 = 21/ 16 = 1 5/16

Answer:

the number is 12

Step-by-step explanation:

9+2x=3x-3

9+3=3x-2x

12=x

The required number is 12.

A linear equation only has one or two variables. No variables in a linear equation is raised to power greater than 1 or used as denominator of a fraction.

Now it is given that,9 more than twice a number is 3 less than three times the same number.

Let the number be x.

So, 9 more than twice a number = 9 +2x

and, 3 less than three times the same number = 3x - 3

Hence we have,

9 + 2x = 3x - 3

Adding 3 both the side we get,

12 + 2x = 3x

Now substracting 2x both the side we get,

x = 12

Hence the number is 12.

More about linear equation :

https://brainly.com/question/16584198

#SPJ2

Answer:

  x^3 +3x^2 +6x

Step-by-step explanation:

Eliminate parentheses using the distributive property. Collect terms. Standard form has the exponents decreasing.

  = 8x -6x^3 +5x^2 -2x^2 -2x +7x^3

  = x^3(-6 +7) +x^2(5 -2) +x(8 -2)

  = x^3 +3x^2 +6x

Answer:

840,000

Step-by-step explanation:

841,487 sice the ten thousands place is under the number five you round down to 840,000

Answer:

a) Null hypothesis:[tex]p\leq 0.12[/tex]  

Alternative hypothesis:[tex]p > 0.12[/tex]  

b) [tex] z_{\alpha}=1.64[/tex]

c) [tex]z=\frac{0.134 -0.12}{\sqrt{\frac{0.12(1-0.12)}{1000}}}=1.362[/tex]  

d) [tex]p_v =P(z>1.362)=0.0866[/tex]  

e) For this case since the statistic is lower than the critical value and the p value higher than the significance level we have enough evidence to FAIL to reject the null hypothesis so then we don't have information to conclude that the true proportion is higher than 0.12

Step-by-step explanation:

Information given

n=1000 represent the random sample selected

X=134 represent the number of young drivers ages 18 – 24 that had an accident

[tex]\hat p=\frac{134}{1000}=0.134[/tex] estimated proportion of young drivers ages 18 – 24 that had an accident

[tex]p_o=0.12[/tex] is the value that we want to verify

[tex]\alpha=0.05[/tex] represent the significance level

Confidence=95% or 0.95

z would represent the statistic

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

Part a

We want to verify if the population proportion of young drivers, ages 18 – 24, having accidents is greater than 12%:  

Null hypothesis:[tex]p\leq 0.12[/tex]  

Alternative hypothesis:[tex]p > 0.12[/tex]  

The statistic would be given by:

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

Part b

For this case since we are conducting a right tailed test we need to find a critical value in the normal standard distribution who accumulates 0.05 of the area in the right and we got:

[tex] z_{\alpha}=1.64[/tex]

Part c

For this case the statistic would be given by:

[tex]z=\frac{0.134 -0.12}{\sqrt{\frac{0.12(1-0.12)}{1000}}}=1.362[/tex]  

Part d

The p value can be calculated with the following probability:

[tex]p_v =P(z>1.362)=0.0866[/tex]  

Part e

For this case since the statistic is lower than the critical value and the p value higher than the significance level we have enough evidence to FAIL to reject the null hypothesis so then we don't have information to conclude that the true proportion is higher than 0.12

Answer:

[tex]7.5 \times 10^6[/tex] miles

Step-by-step explanation:

[tex](5\times 10^4)\times (1.5 \times 10^2)=\\(5\times 1.5) \times (10^4 \times 10^2)=\\7.5 \times 10^6[/tex]

Hope this helps!

Answer:

d) No, this would not be unusual because 46% is only 1.2 standard errors from 40%.

Step-by-step explanation:

Problems of normally distributed 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.

If the z-score is higher than 2 or lower than -2, X is unusual.

In this question:

Mean = 40%. So [tex]\mu = 0.4[/tex]

Standard error = 5%. So [tex]\sigma = 0.05[/tex]

Is 46% unusual?

We have to find Z when X = 0.46. So

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

[tex]Z = \frac{0.46 - 0.4}{0.05}[/tex]

[tex]Z = 1.2[/tex]

1.2 is lower than 2, that is, it is only 1.2 standard deviations from the mean.  So 46% is not unusual.

So the correct answer is:

d) No, this would not be unusual because 46% is only 1.2 standard errors from 40%.

Answer:

12/25

Step-by-step explanation:

multiply the fractions.

multiply the numbers.

Answer:

D about 44%

Step-by-step explanation:

just took the tests

Using the percentage concept and the given table, it is found that about 39% of males supported Wilson.

The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

[tex]P=\frac{a}{b}\times 100%[/tex]

In this problem, males are 46% of the sample, and 18% are males that supported Wilson,

[tex]P=\frac{18}{46} \times 100=39[/tex]

About 39% of males supported Wilson.

To learn more about the percentage of visit:

https://brainly.com/question/24304697

#SPJ2

Answer:

C≈40.21cm

Step-by-step explanation:

Answer:

40.192

Step-by-step explanation:

the radius is half of the diameter so the diameter is 12.8 now 12.8 times pi / 3.14