All categories

3 years ago

I need help on number twenty three

Mathematics

1 answer:

vekshin13 years ago

6 0

Answer:A

Step-by-step explanation:

O has more than A

You might be interested in

Consider a normal population distribution with the value of σ known. (a) what is the confidence level for the interval x ± 2.81σ

sammy [17]

The confidence level would be 99.5%.

When we know the confidence level, we find the z-score by:
Dividing the CL by 100;
Subtracting this result from 1;
Dividing this result by 1;
Subtracting this result by 1.

Algebraically, this looks like:
$1-(\frac{1-(\frac{CL}{100})}{2})$

Using a z-table (http://www.z-table.com), we see that a z-score of 2.81 results in an area under the curve of 0.9975, so we now have
$1-(\frac{1-(\frac{CL}{100})}{2})=0.9975$

To begin solving this, we will subtract 1 from both sides:
$-(\frac{1-(\frac{CL}{100})}{2})=-0.0025
\\
\\(\frac{1-(\frac{CL}{100})}{2})=0.0025$

We will now multiply both sides by 2:
$1-\frac{CL}{100}=0.005$

Subtract 1 from both sides:
$-\frac{CL}{100}=-0.995
\\
\\\frac{CL}{100}=0.995$

Multiply both sides by 100:
CL = 99.5

7 0

2 years ago

Can you guys plz help ASAP

yuradex [85]

It’s y = 1/8x - 3, so the first answer

6 0

2 years ago

Read 2 more answers

Your monthly living expenses are $1500 on an income of $1,650 per month. Your goal is to have an emergency fund of 4 times your

DochEvi [55]

Your end goal is to have $6000 total in 12 months. since you have $2400 already you can subtract that from 6000 leaving you with $3600 over the course of 12 months. since you already put $150 in a month over the course of 12 months you would have $1800 which is only half of the goal of $3600. in order for you to put in $3600 you would have to put an additional 150 in your savings along with your regular 150 making the answer b.

6 0

3 years ago

Read 2 more answers

The perimeter of a building is 900 feet. If the length of the building is 400 feet, find the width. How many lights will be need

Helen [10]

Answer:

The width of the building is 50 lamps and 60 lamps will be needed.

Step-by-step explanation:

The perimeter is computed by the sum of the sides of the building, since the length and width are equal on the oposite sides of the building, the perimeter is given by:

perimeter = 2*length + 2*width

900 = 2*(400) + 2*width

2*width + 800 = 900

2*width = 900 - 800

2*width = 100

width = 100/2 = 50 feets

To know how many lights bulbs will be needed we need to take the perimeter of the building and divide it by the space between the lamps. We have:

number o lamps = 900/15 = 60 lamps

8 0

3 years ago

Read 2 more answers

Point K is graphed on a number line at 3. Point L is 11 units away from point K on the number line.

notsponge [240]

3+/-11
add 11 to 3
11+3=14
minus 11 from 3
3-11=-8

the coordinate could be 14 or -8

6 0

3 years ago