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2 years ago

HELPP! How many 3 digit numbers have a product of the digits that equals sixty?

Mathematics

2 answers:

Elena L [17]2 years ago

6 0

Yes those are called factors and they listed them for you so mark them brainiest ^^^

gavmur [86]2 years ago

4 0

Answer:

Step-by-step explanation:

Let's see the factor pairs of 60 first.

1,60

2,30

3,20

4,15

5,12

6,10

10,6

12,5

15,4

20,3

60,1

1,60 and 60,1 is not possible for xy1 and 1xy. It is because any one digit*one digit=not 60. The remaining pairs are...

2,30

3,20

4,15

5,12

6,10

10,6

12,5

15,4

20,3

30,2

Next, start with 2,30 and 30,2

The one digit factor pairs of 30 is 5 and 6.

So...

256 is possible

265 is possible

562 is possible

652 is possible

3,20

4,15

5,12

6,10

10,6

12,5

15,4

20,3

Next, 3,20 and 20,3

20=4*5

453,543,345,354

4,15

5,12

6,10

10,6

12,5

15,4

4,15 and 15,4

4 number that are possible(5*3=15)

5,12

6,10

10,6

12,5

+12

5,12 and 12,5

3,4 and 2,6

526,562,534,543,435,345,265,625

6,10

10,6

+20

10=5*2

20+4=24

(Sorry it's long)

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A candidate for a US Representative seat from Indiana hires a polling firm to gauge her percentage of support among voters in he

UkoKoshka [18]

Answer:

a) The minimum sample size is 601.

b) The minimum sample size is 2401.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

For this problem, we have that:

We dont know the true proportion, so we use $\pi = 0.5$ , which is when we are are going to need the largest sample size.

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

a. If a 95% confidence interval with a margin of error of no more than 0.04 is desired, give a close estimate of the minimum sample size that will guarantee that the desired margin of error is achieved. (Remember to round up any result, if necessary.)

This is n for which M = 0.04. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.04 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.04\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.04}$

$(\sqrt{n})^2 = (\frac{1.96*0.5}{0.04})^2$

$n = 600.25$

Rounding up

The minimum sample size is 601.

b. If a 95% confidence interval with a margin of error of no more than 0.02 is desired, give a close estimate of the minimum sample size necessary to achieve the desired margin of error.

Now we want n for which M = 0.02. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.02 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.02\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.02}$

$(\sqrt{n})^2 = (\frac{1.96*0.5}{0.02})^2$

$n = 2401$

The minimum sample size is 2401.

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3 years ago

Last week, Becky went to dance class 4 times. Each class was 3/2 hours.

Soloha48 [4]

last week because, the class that week was only 1 hour and last weeks was 3/2 an hour

8 0

3 years ago

A line has a slope of zero and passes through the point (-2, 3). Which of the following points must also lie on the line?

brilliants [131]

Answer:

(5,3)

Step-by-step explanation

Because the slope is 0, it means its a horizontal line. because the horizontal is on 3, then it doesnt matter what x is as long as y is 3 if that makes any sense.

7 0

3 years ago

Please help. Give answer and why its the answer. <br>I will give brainliest!

777dan777 [17]

(a) False. The number 7 is NOT an element of set B as 7 is not in the set B (2, 3, 4 and 0 are though)

(b) False. 3 is a member of set A. It is the third element listed in the set. So saying "3 is not a member of set A" is a false claim

(c) True. The value 0 is found in set B. It is the last element listed.

Final Answer: Choice C)

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3 years ago

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zalisa [80]

Sets of three integers that could be right triangles are called pythagorean triples. the only pythagorean triple including 7 is 7, 24, and 25. so the length of the other leg is 24 and the length of the hypotenuse is 25. hope this helped!

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3 years ago

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