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melisa1 [442]
1 year ago
11

Use PEMDAS to find the surface area.81 + 72(4)612 km2369 km2157 km2

Mathematics
1 answer:
DanielleElmas [232]1 year ago
3 0

Given:

\begin{gathered} 81+72(4) \\ \text{Using PEMDAS} \\ \text{ P = Parenthesis comes first} \end{gathered}

Hence,

81+\text{ 288}undefined

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Answer:

The answer is below

Step-by-step explanation:

Given that:

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z=\frac{x-\mu}{\sigma}, for a sample size of n, the z score is: z=\frac{x-\mu}{\sigma/\sqrt{n} }

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For x = 80:

z=\frac{x-\mu}{\sigma/\sqrt{n} }=\frac{80-70}{5.5/\sqrt{5} } =4.07

The probability that a mean life of a random sample of 5 such turtles falls between 60 and 80 years = P(60 < x < 80) = P(-4.07 < z < 4.07) = P(z < 4.07) - P(z < -4.07) = 1 - 0 = 1 = 100%

b) The z score that corresponds to top 10% is -1.28.

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Answer:

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Step-by-step explanation:

The number in the place to the right of the hundreds place is 5, in the tens place. That digit is greater than 4, so the rounding is to the next higher hundred: 1300.

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