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victus00 [196]
3 years ago
7

I need this asappppp Yelp help me

Mathematics
1 answer:
Mandarinka [93]3 years ago
8 0

Answer:

Answer is C.

Step-by-step explanation:

the 7 in 7.5 is in the ones place so you times it by 10 and the 7 would move to the 10s place value

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Using the diagram, find tan B. Express your answer as a decimal rounded to the nearest hundredth.
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tan = opposite/hypotenyse

for B, this is 24/25

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Find the surface area of this cuboid
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32cm^2

Step-by-step explanation:

The surface area is the sum of surfaces of all walls.

The 3 visible walls are 2cm*3cm, 2cm*3cm and 2cm*2cm.

The 3 invisible walls are each identical to the parallell walls.

The surface area is

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Read 2 more answers
1 Find the value of C to that the function probability density function defined as follow, also calculate the man and variance /
Viefleur [7K]

Answer:

c = \frac{1}{12}

The mean of the distribution is 0.25.

The variance of the distribution is of 0.6875.

Step-by-step explanation:

Probability density function:

For it to be a probability function, the sum of the probabilities must be 1. The probabilities are 3c, 3c and 6c, so:

3c + 3c + 6c = 1

12c = 1

c = \frac{1}{12}

So the probability distribution is:

P(X = -1) = 3c = 3\frac{1}{12} = \frac{1}{4} = 0.25

P(X = 0) = 3c = 3\frac{1}{12} = \frac{1}{4} = 0.25

P(X = 1) = 6c = 6\frac{1}{12} = \frac{1}{2} = 0.5

Mean:

Sum of each outcome multiplied by its probability. So

E(X) = -1(0.25) + 0(0.25) + 1(0.5) = -0.25 + 0.5 = 0.25

The mean of the distribution is 0.25.

Variance:

Sum of the difference squared between each value and the mean, multiplied by its probability. So

V^2(X) = 0.25(-1-0.25)^2 + 0.25(0 - 0.25)^2 + 0.5(1 - 0.25)^2 = 0.6875

The variance of the distribution is of 0.6875.

4 0
3 years ago
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