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Eduardwww [97]
3 years ago
9

What is the surface area of a right rectangular prism with a width of 12 inches, a length of 6 inches, and a height of 8 inches?

Mathematics
1 answer:
dalvyx [7]3 years ago
7 0
The answer would be d) 576
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Please help me with this i need a real answer not tjose file things
anyanavicka [17]

Answer:

c

Step-by-step explanation:

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2 years ago
A simple random sample of electronic components wil be selected to test for the mean lifetime in hours. Assume that component li
Serjik [45]

Answer:

189 components must be sampled.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.005 = 0.995, so Z = 2.575.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

Assume that component lifetimes are normally distributed with population standard deviation of 16 hours.

This means that \sigma = 16

How many components must be sampled so that a 99% confidence interval will have margin of error of 3 hours?

n components must be sampled.

n is found when M = 3. So

M = z\frac{\sigma}{\sqrt{n}}

3 = 2.575\frac{16}{\sqrt{n}}

3\sqrt{n} = 2.575*16

\sqrt{n} = \frac{2.575*16}{3}

(\sqrt{n})^2 = (\frac{2.575*16}{3})^2

n = 188.6

Rounding up:

189 components must be sampled.

4 0
3 years ago
What is the measure of angle c?
svlad2 [7]

Answer:

c=29°

Step-by-step explanation:

angle b=97°{ vertically opposite angle}

now,

97°+54°+c=180°{ sum of angle of triangle}

  • x=180-151
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<h2>stay safe healthy and happy.</h2>
4 0
3 years ago
Read 2 more answers
Is the statement 2(3+5x)=6+5x always true?
mihalych1998 [28]
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5 0
3 years ago
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Maria deposits $1,950 into a savings account that earns simple interest at a rate of 3%. She makes no withdrawals. How much inte
Elenna [48]

Answer:

x = .06418

Step-by-step explanation:

2 + (9.2)−8x = 2.32

(9.2)−8x = 2.32 − 2

log (9.2)−8x = log .32

−8x log 9.2 = log .32

−8x log 9.2

−8 log 9.2

=

log .32

−8 log 9.2

x = .06418

6 0
3 years ago
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