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3 years ago

WILL GIVE BRANLIEST,VOTE, AND RATE!!!!!!!!!!!

Mathematics

1 answer:

kondaur [170]3 years ago

4 0

Step-by-step explanation:

1st digit is 1 number (1)

2nd digit is (3,4,5) so it's 3 numbers

third digit is (6,7,8,9) is it's 4 numbers

last 7 digits is 10 (0,1,2,3,4,5,6,7,8,9)

multiply

1*3*4*10=120

so answer is 120 phone numbers

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The legs of the isosceles triangle each measure 14 inches. calculate the length of the hypotenuse

Evgen [1.6K]

Answer:

I'm guessing you are talking about an isosceles RIGHT triangle.

In such a triangle, the length of the hypotenuse equals the length of either leg times the square root of 2.

hypotenuse = 14 * square root of 2 =

14 * 1.4142135623731 = 19.79898987322330

or rounding that equals 19.80 inches

Step-by-step explanation:

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3 years ago

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Which of the following linear equations describes that relationship?

JulsSmile [24]

Answer:

D. f(x) = 4x - 3

Step-by-step explanation:

Use two pairs of points to work out the equation:

(1, 1) and (2, 5)

Find the slope:

m = (5 - 1) / (2 - 1) = 4/1 = 4

Find the y-intercept:

1 = 4*1 + b
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The line is:

f(x) = 4x - 3

Correct choice is D

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2 years ago

In September 2011, Gallup surveyed 1,004 American adults and asked them whether they blamed Barack Obama a great deal, a moderat

Alexus [3.1K]

Answer:

The 99% confidence interval for the proportion of all American adults who blame Barack Obama a great deal or a moderate amount for U.S. economic problems is (0.4894, 0.5706)..

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 $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 1004, \pi = 0.53$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.53 - 2.575\sqrt{\frac{0.53*0.47}{1004}} = 0.4894$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.53 - 2.575\sqrt{\frac{0.53*0.47}{1004}} = 0.5706$

The 99% confidence interval for the proportion of all American adults who blame Barack Obama a great deal or a moderate amount for U.S. economic problems is (0.4894, 0.5706)..

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

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Simora [160]

Answer:

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We have that the distance of a comet from Earth is about 7.63*10³ .

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3 years ago