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MissTica
3 years ago
12

Really need help...

Mathematics
1 answer:
Andre45 [30]3 years ago
4 0
Sinθ = 16/20 = 0.8 
θ = arcsin(0.8) ≅ 53° 
::::: 
Use ^2 to represent ². 
Pythagorean identity: 
sin²(x) + cos²(x) = 1
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3.Which value of x makes the equation 1.25(4x − 10) = 7.5 true?
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x=4

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22) 22

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Let z denote a random variable that has a standard normal distribution. Determine each of the probabilities below. (Round all an
Lorico [155]

Answer:

P(Z < 2.37) = 0.9911.

Step-by-step explanation:

We are given that Let z denote a random variable that has a standard normal distribution.

Let Z = a random variable

So, Z ~ Standard Normal(0, 1)

As we know that the standard normal distribution has a mean of 0 and variance equal to 1.

                          Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = mean = 0

           \sigma = standard deviation = 1

Now, the probability that z has a value less than 2.37 is given by = P(Z < 2.37)

        P(Z < 2.37) = P(Z < \frac{2.37-0}{1} ) = P(Z < 2.37) = 0.9911

The above probability is calculated by looking at the value of x = 2.37 in the z table which has an area of 0.9911.

4 0
3 years ago
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