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mamaluj [8]
3 years ago
13

Help me plz I dont know this part.​

Mathematics
2 answers:
Ivanshal [37]3 years ago
7 0

Answer:

(-4)^{10}

Step-by-step explanation:

Using the rule of exponents

a^{m} × a^{n} ⇔ a^{(m+n)} , then

(- 4)(-4)^{9}

= (-4)^{1} × (-4)^{9}

= (-4)^{(1+9)}

= (-4)^{10}

OleMash [197]3 years ago
6 0
Answer: 1048576

Working: first you do -4^9 which is -4 to the power of 9.
=-262144
Then -262144 X -4 = 1048576

Hope this helps :D

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Answer:

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Answer:

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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
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Answer:

Grade D score:

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Step-by-step explanation:

We are given the following information in the question:

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Standard Deviation, σ = 7.1

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

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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  

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

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

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