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3 years ago

A scale drawing for a plot of land is shown below.

Mathematics

1 answer:

Vitek1552 [10]3 years ago

6 0

The area of real backyard is 72 square meters.

Step-by-step explanation:

Given,

Length of rectangular backyard = 8 cm

Width of rectangular backyard = 4 cm

According to scale;

2 cm = 3 m

1 cm = $\frac{3}{2} = 1.5\ m$

Real length of backyard = 8*1.5 = 12 m

Real width of backyard = 4*1.5 = 6 m

Real area of backyard = Length * Width

Real area of backyard = 12*6 = 72m²

The area of real backyard is 72 square meters.

Keywords: area, unit rate

Learn more about areas at:

#LearnwithBrainly

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Hayden wanted to investigate whether there was a difference in the time spent in the checkout line between two grocery stores. S

Ber [7]

Answer:

No. The data in this study were not based on a random method. This is a key requirement for an inference to be made from the two-sample t-test.

Step-by-step explanation:

1. Hayden can use the two-sample t-test (also known as the independent samples t-test)to find out if there was a difference in the time spent in the checkout time between two grocery stores and to conclude whether the difference in the average checkout time between the two stores is really significant or if the difference is due to a random chance. There are three conditions to be met when using the two-sample t-test.

2. The first condition is that the sampling method must be random. This requirement was not met in this study. Each customer from each store should have an equal chance of being selected for the study. This was not achieved.

3. The distributions of the sample data are approximately normal. This is achieved with a large sample size of 30 customers selected for each study.

4. The last but not the least condition is the independence of the sample data. Sample data here is independent for both samples.

5 0

3 years ago

Which of the following would be a correct interpretation of a 99% confidence interval such as 4.1 less than muless than5.6? Ch

Harrizon [31]

Answer: A. We are 99% confident that the interval from 4.1 to 5.6 actually does contain the true value of mu.

Step-by-step explanation:

The correct interpretation of a 99% confidence interval is that we are 99% confident that the true population mean falls in it.

Given 99% confidence interval : $4.1$

Then, the correct interpretation : We are 99% confident that the interval from 4.1 to 5.6 actually does contain the true value of mu.

8 0

3 years ago

What is the sin value of 5pi/3?

svetoff [14.1K]

if you do not have a Unit Circle, this is a great time to get one, you can find many online just do a quick search for "unit circle".

Check the picture below.

7 0

3 years ago

Read 2 more answers

A surf instructor has an initial fee of $12 and charges $8 per hour for lessons,

professor190 [17]

Answer:

I am stuck on that question tooo

Step-by-step explanation:

3 0

3 years ago

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The length of a rectangle is 5 ft longer than its width.

murzikaleks [220]

Answer:

50 ft²

Step-by-step explanation:

If W is the width and L is the length, then:

L = W + 5

2L + 2W = 30

Solve the system of equations with substitution or elimination. Using substitution:

2(W + 5) + 2W = 30

2W + 10 + 2W = 30

4W = 20

W = 5

L = 10

The area of the rectangle is:

A = LW

A = 50 ft²

8 0

3 years ago