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schepotkina [342]
2 years ago
12

What is the definition of triangle

Mathematics
2 answers:
Likurg_2 [28]2 years ago
7 0

Answer:

a plane figure with three straight sides and three angles.

Step-by-step explanation:

Sholpan [36]2 years ago
3 0

Answer:

rtshsrst6hteshyrjhryjy

Step-by-step explanation:

fgjyryrjutkj

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Question 9 Of 1000 randomly selected cases of lung cancer, 841 resulted in death within 10 years. Construct a 95% two-sided conf
givi [52]

Answer:

0.818335 ≤ p ≤ 0.86366

Step-by-step explanation:

Given that:

Sample size (n) = 1000

Positive lung cancer = 841

n(p) = 841, p(p) = 841/1000 = 0.841

n(1 - p) = 1000 - 841 = 159

1 - p = 0.159

95% confidence interval

For a 95% confidence interval : z = 1.96

P ± z√p(1-p) / n

0.841 ± 1.96 * √0.841(0.159) / 1000

0.841 - (1.96 * 0.0115636) = 0.818335344

0.841 + (1.96 * 0.0115636) = 0.863664656

0.818335 ≤ p ≤ 0.86366

4 0
3 years ago
In a recent contest, the mean score was 210 and the standard deviation was 25. a) Find the z-score of John who scored 190 b) Fin
denpristay [2]

Answer:

a) Z = -0.8

b) Z = 2.4

c) Mary's score was 241.25.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

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

Z = \frac{X - \mu}{\sigma}

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:

\mu = 210, \sigma = 25

a) Find the z-score of John who scored 190

Z = \frac{X - \mu}{\sigma}

Z = \frac{190 - 210}{25}

Z = -0.8

b) Find the z-score of Bill who scored 270

Z = \frac{X - \mu}{\sigma}

Z = \frac{270 - 210}{25}

Z = 2.4

c) If Mary had a score of 1.25, what was Mary’s score?

Z = \frac{X - \mu}{\sigma}

1.25 = \frac{X - 210}{25}

X - 210 = 25*1.25

X = 241.25

Mary's score was 241.25.

3 0
3 years ago
Read 2 more answers
Describe the discontinutiy for the function f(x)= x^2+5/x-5
coldgirl [10]

Answer:

f(x) = x² + 5 / x - 5

There is infinite discontinuity at x = 5. At this value, the graph becomes undefined because the denominator is 0.

5 0
3 years ago
How can you recognize when a pattern in real life is linear or nonlinear?
andreev551 [17]

Answer:

Step-by-step explanation:

If a table is linear, Y must change at a constant rate as X increases by 1. If a table is not linear, Y doesn't change at a constant rate at all. In fact, nonlinear tables don't even have an equation because there's no predicting what the Y-value is.

5 0
3 years ago
Read 2 more answers
Verena lives in a city where the ratio of sunny days to rainy days is 4 to 3.
alexandr402 [8]

12 rainy days because 16 divided by 4 is 4. SO, 4 times 3 is 12

8 0
3 years ago
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