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Nataliya [291]
2 years ago
10

Find the angles marked with letters. Please help!! ​

Mathematics
1 answer:
Paladinen [302]2 years ago
3 0
A=34°
B=76°
C and d = 70°
because a triangle is 180° and we know
a+b+c=180
76+34=110
180-110=70
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An IAB study on the state of original digital video showed that original digital video is becoming increasingly popular. Origina
never [62]

Answer:

11.51% probability that fewer than 25 in your sample will watch original digital videos

Step-by-step explanation:

I am going to use the normal approximation to the binomial to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

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.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

In this problem, we have that:

n = 100, p = 0.30

So

\mu = E(X) = np = 100*0.3 = 30

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{100*0.3*0.7} = 4.58

What is the probability that fewer than 25 in your sample will watch original digital videos?

Using continuity correction, this is P(X < 25 - 0.5) = P(X < 24.5), which is the pvalue of Z when X = 24.5. So

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

Z = \frac{24.5 - 30}{4.58}

Z = -1.2

Z = -1.2 has a pvalue of 0.1151

11.51% probability that fewer than 25 in your sample will watch original digital videos

5 0
3 years ago
Is the following relation a function?
joja [24]
Yes, that is in fact a function. 


Hope I Helped :)

3 0
3 years ago
Reward:15 points:brainiest answer
anyanavicka [17]
I'm pretty sure you can find it by dividing the ratios

9/12 = 0.75

10/15 = 0.67

So Emilie's team had a higher ratio of wins to losses
8 0
3 years ago
Q7Which statement is incorrect for the graph of thefunction y = -5 cosGcos( 3 (x – 3)) +62The period is 4.The amplitude is 3.The
guajiro [1.7K]

The given function is,

y=-5\cos (\frac{\pi}{2}(x-3))+6

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Thus, period is correct.

The amplitude can be determined as,

\begin{gathered} Amplitude=\frac{\max -\min }{2} \\ =\frac{11-1}{2} \\ =5 \end{gathered}

Thus, amplitue is incorrect.

The range is,

y\in\lbrack1,11\rbrack

Thus, the range is correct.

The midline is,

\begin{gathered} \text{midline}=\frac{\max +\min }{2} \\ =\frac{1+11}{2} \\ =6 \end{gathered}

Thus, the midline is correct.

Thus, option (b) is the solution.

5 0
1 year ago
Alinethatincludesthepoint(2, 7)has slope of 5 . what isitsequationin slope -intercept form
Vesna [10]
10? Im not sure though my friend just told me it was 10
8 0
2 years ago
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