All categories

3 years ago

How many square feet of outdoor carpet will we need for this hole?

Mathematics

2 answers:

Llana [10]3 years ago

8 0

30 ft

Area= base*height ad you want the sum of the areas of each rectangle.

The top one had an are of 8 [4*2]
The middle one had an area of 12 [6*2]
The bottom one had an area of 10 [5*2]

8+12+10=30!

boyakko [2]3 years ago

6 0

First, break up the entire thing into smaller rectangles then find the area of all of those rectangles and add them together to get 30 square feet.

You might be interested in

Using the simple random sample of weights of women from a data set, we obtain these sample statistics: nequals45 and x overbar

Tomtit [17]

Answer: (141.1, 156.48)

Step-by-step explanation:

Given sample statistics : $n=45$

$\overline{x}=148.79\text{ lb}$

$\sigma=31.37\text{ lb}$

a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = $\mu=148.79\text{ lb}$

b) The confidence interval for the population mean is given by :-

$\mu\ \pm E$ , where E is the margin of error.

Formula for Margin of error :-

$z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given : Significance level : $\alpha=1-0.90=0.1$

Critical value : $z_{\alpha/2}=z_{0.05}=\pm1.645$

Margin of error : $E=1.645\times\dfrac{31.37}{\sqrt{45}}\approx 7.69$

Now, the 90% confidence interval for the population mean will be :-

$148.79\ \pm\ 7.69 =(148.79-7.69\ ,\ 148.79+7.69)=(141.1,\ 156.48)$

Hence, the 90% confidence interval estimate of the mean weight of all women= (141.1, 156.48)

3 0

2 years ago

One zero of x^3 - 4x = 0 is 0 what are the other zeros of the function

myrzilka [38]

So you have x^3 - 4x = 0. What you can do is pull out an x from both x^3 and - 4x so it looks like this:

$x( {x}^{2} - 4) = 0$

Then you can find a number that makes the part inside the parentheses turn into zero. For beginners, it may be easier to write it out seperately and solve for x.

${x}^{2} - 4 = 0$

We need to solve for x, so the first step is to add 4 to both sides, so we get something like this:

${x}^{2} = 4$

Then, we can square root both sides to get rid of the power on the x, so it looks like this:

$x = \sqrt{4}$

Now, every square root has two answers, a positive and a negative. If we look at the bottom example:

${2}^{2} = 4$

${( - 2)}^{2} = 4$

We can see that both -2 and 2 to the power of two will equal to 4.

So finally, we get:

$x = - 2 \: and \: 2$

These are the other 'Zero's for the original function. If you are not sure of what a 'Zero' is, it is where the function crosses over the x-axis on a graph.

5 0

2 years ago

Solve the equation.<br><br> 12a=11

USPshnik [31]

A= 11/12 i hope this helped !!!

5 0

2 years ago

The area of Kylie's room is 400 square feet. The width of her room is 20 feet. What is the length of her room?

zavuch27 [327]

Answer:

length=20 (Sorry if this is wrong)

Step-by-step explanation:

400÷20=20

3 0

2 years ago

WILL MARK BRAINLIEST

atroni [7]

Answer:

7.405882353 years

Step-by-step explanation:

Simple interest is

A = P(1+rt)

Where A is the amount in the account

P is the principle invested

r is the rate and

t is the time

6593.75 = 5000( 1+ .0425*t)

Divide each side by 5000

6593.75/5000 = ( 1+ .0425*t)

1.31475 = ( 1+ .0425*t)

Subtract 1 from each side

.31475 = .0425t

Divide each side by.0425

.31475/.0425 = .0425t/.0425

7.405882353 = t

7.405882353 years

8 0

3 years ago

Read 2 more answers