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3 years ago

I was sick the day that the class went over how to do this and I don’t know how to do it.

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

6 0

You first need to know the equation A=pi x r^2. The equation you need for this problem is pi (3.14) x 3^2

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A survey was conducted that asked 1002 people how many books they had read in the past year. results indicated that x overbar eq

Shalnov [3]

The confidence interval would be (10.44, 12.16). This means that if we take repeated samples, the true mean lies in 90% of these intervals.

To find the confidence interval, we use:
$\overline{x} \pm z*(\frac{\sigma}{\sqrt{n}})$

We first find the z-value associated with this. To do this:
Convert 90% to a decimal: 90% = 90/100 = 0.9
Subtract from 1: 1-0.9 = 0.1
Divide by 2: 0.1/2 = 0.05
Subtract from 1: 1-0.05 = 0.95

Using a z-table (http://www.z-table.com) we see that this is directly between two z-scores, 1.64 and 1.65; we will use 1.645:

$11.3 \pm 1.645*(\frac{16.6}{\sqrt{1002}})
\\
\\11.3 \pm 0.86
\\(11.3-0.86, 11.3+0.86)
\\(10.44, 12.16)$

3 0

4 years ago

5/8 of 10 liters please :)

Finger [1]

Answer:

6.25liters

Step-by-step explanation:

5/8 × 10

Lcm is 8

5×10/8

50/8

6.25

So 5/8 of 10liters is

6.25liters

4 0

3 years ago

Read 2 more answers

Which graph represents f(x) =|x − 5| + |x − 4|?

Dima020 [189]

The correct graph is graph 4.

You can find this by looking for recognizable points. This is the easiest way to find composite graphs. In the graph f(x) =|x − 5| + |x − 4| both 5 and 4 yield the answer of 1. You can see that in the examples below:

f(x) =|x − 5| + |x − 4|
f(5) =|5 − 5| + |5 − 4|
f(5) =|0| + |1|
f(5) = 0 + 1
f(5) = 1

f(x) =|x − 5| + |x − 4|
f(4) =|4 − 5| + |4 − 4|
f(4) =|-1| + |0|
f(4) = 1 + 0
f(4) = 1

Now we can look for graphs that have those two reference points. The 4th graph is the only one that has those.

7 0

3 years ago

Read 2 more answers

PLEASE HELP (0.1)^5 simplified

Tpy6a [65]

Answer:

0.1^5=0.00001

Step-by-step explanation:

$0.1^5\\0.1^5=0.00001$

4 0

3 years ago

Perform the indicated operation 5 1/6 - 2 2/3

goldenfox [79]

Answer:

2½

Step-by-step explanation:

First find the Least Common Denominator [LCD], which is 6, then convert 5⅙:

5⅙ → 4 7⁄6

$5 \frac{1}{6} - 2 \frac{2}{3} = 4 \frac{7}{6} - 2 \frac{4}{6} = 2 \frac{3}{6} = 2 \frac{1}{2}$

You see, we regrouped 1 from 5⅙ to make sure that the top mixed number had a higher value than the bottom mixed number, so it is much easier to work with.

I am joyous to assist you anytime.

7 0

3 years ago