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3 years ago

Help me figure out how to simplify this please:

Mathematics

1 answer:

-BARSIC- [3]3 years ago

5 0

Think of it this way:
8^3 means you have 3 times 8 multiplied together (8*8*8)
Now this block is raised to the power of 7, so there are 7 blocks of 8*8*8 multiplied together.
How many 8s do we have? 7 blocks of 3s, 7*3=21
Thus n=21

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Answer:

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3 years ago

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What number should Rihanna use for the height of the parallelogram if she uses 28 inches for the base

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Answer:

$Height = 7in$

Step-by-step explanation:

Given

See attachment for parallelogram

$Base = 28in$

Required

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The opposite sides of a parallelogram are equal and the height is the distance between the parallel sides.

From the question, we have:

$Base = 28in$

Also from the question, the difference between the two parallel sides is 7in.

<em>Hence, the height of the parallelogram in 7in</em>

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3 years ago

The average college lecture hall (auditorium) can seat 60 students with a standard deviation of 21. Assume that a total of 60 le

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Answer:

The standard deviation of the sample mean is $\sigma _ {\= x } = 2.711$

Step-by-step explanation:

From the question we are told that

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The sample size is $n = 60$

Generally the standard deviation of the sample mean is mathematically represented as

$\sigma _ {\= x } = \frac{\sigma }{\sqrt{n} }$

substituting values

$\sigma _ {\= x } = \frac{ 21 }{\sqrt{60} }$

$\sigma _ {\= x } = 2.711$

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3 years ago