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zubka84 [21]
3 years ago
11

How would you answer this?

Mathematics
1 answer:
horsena [70]3 years ago
4 0

Answer:

d

Step-by-step explanation:

the range and middle range

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Which graph shows a graph of a circle with equation x2+(y+3)2=9?
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Center (0,-3)
radius = 3

answer is D. 
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4 years ago
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An English professor assigns letter grades on a test according to the following scheme. A: Top 5% of scores B: Scores below the
tangare [24]

Answer:

Grade D score:

69 \leq x \leq 74

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 78.8

Standard Deviation, σ = 7.1

We are given that the distribution of scores on test is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

D: Scores below the top 77% and above the bottom 9%

We have to find the value of x such that the probability is 0.77

P( X > x) = P( z > \displaystyle\frac{x - 78.8}{7.1})=0.77  

= 1 -P( z \leq \displaystyle\frac{x - 78.8}{7.1})=0.77  

=P( z \leq \displaystyle\frac{x - 78.8}{7.1})=0.23  

Calculation the value from standard normal z table, we have,  

\displaystyle\frac{x - 78.8}{7.1} =-0.739\\\\x = 73.55  

We have to find the value of x such that the probability is 0.09

P(X < 0.09) = \\\\P( X < x) = P( z < \displaystyle\frac{x - 78.8}{7.1})=0.09

Calculation the value from standard normal z table, we have,  

\displaystyle\frac{x - 78.8}{7.1} = -1.341\\\\x = 69.27  

Thus, the numerical value of score to achieve grade D is

69 \leq x \leq 74

6 0
3 years ago
A fish tank, in the shape of a rectangular prism with dimensions 51 cm by 39 cm by 28 cm, is 95% filled with water. A solid log
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Answer:

The end answer is 669.4

Step-by-step explanation:

So you take the volume of the fish tank: 51*39*28=55692, but the tank is only 95% full, so you take 55692 and divide it by 100 and multiply it by 95, you get 52907.4. Then you calculate the volume of the log: 3.14*5^2*44=3454.

Now that we know these values, we take the volume of the water which is 52907.4 and add the volume of the log 3454 which gets you 56361.4.

Now we know the combined volume of the water and the log, we can remove the volume of the tank, which will still be holding the water that hasn't exceeded the capacity of the tank: 56361.4-55692=669.4

So then we know what has exceeded the capacity of the tank, which is how much water has spilled

So the water spilled equals 669.4 cubic centimetres of water.

6 0
3 years ago
Is this right yes or no
eduard

Answer:

yes

Step-by-step explanation:

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The fastest a human has ever run was 27 mph. How many miles per minute did tge human run?
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He ran .45 miles per minute
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