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3 years ago

Which of the following is an irrational number?

Mathematics

1 answer:

Serhud [2]3 years ago

6 0

A. 1.9 is an irrational number

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The courtyard outside East Middle School is in the shape of a rectangle and half-circle.

Nadya [2.5K]

Answer:

The correct option is the third one counting from the top. (5892 m^2)

Step-by-step explanation:

First, we need to remember that:

For a rectangle of length L and width W, the area is:

A = L*W

For a circle of diameter D, the area is:

A = pi*(D/2)^2

Where pi = 3.14

In the image, we can see a rectangle and half a circle, the total area of the image will be equal to the area of the rectangle plus the area of the half circle.

In the image, we can see a rectangle of length L = 100m and width W = 50m

Then the area of the rectangle is:

A = 100m*50m = 5000m^2

And we can see that for the half-circle the diameter is D = 50m

Note that the area of a half-circle is half of the area of a complete circle, then the area of that half-circle is:

A = (1/2)*(3.14*(50m/2)^2) = 981.25 m^2

If we add these two areas we get:

Total area = 5000m^2 + 981.25 m^2 = 5981.25 m^2

If we round it up, we get:

Total area = 5982 m^2

The correct option is the third one counting from the top.

8 0

2 years ago

A new company is in the process of evaluating its customer service. The company offers two types of sales: (1) Internet sales an

iragen [17]

Answer:

$H_A: P_{\text{Internet}}-P_{\text{Store}} > 0.10$

Step-by-step explanation:

We are given the following in the question:

Let $P_{\text{Internet}}$ be the proportion of the internet sales and $P_{\text{Store}}$ be the proportion of the store sale.

Hypothesis:

We have to conduct a hypothesis to check that the Internet sales are more than 10 percent higher than store sales.

Thus, we can design the null and alternative hypothesis as:

$H_{0}: P_{\text{Internet}}-P_{\text{Store}}\leq 0.10\\H_A: P_{\text{Internet}}-P_{\text{Store}} > 0.10$

Alternate Hypothesis:

The alternate hypothesis states that the proportion of the internet sales is greater than the proportion of store sales by 10 percent.

3 0

3 years ago

Bike rental company A charges an initial fee of $8 plus $1.25 for every hour spent biking. Bike rental company B charges $2.75 f

Lera25 [3.4K]

2.75h =8-1.25h is thus the one

7 0

3 years ago

4y and 5xy are like terms or are unlike terms

Norma-Jean [14]

Answer:

Unlike terms

Step-by-step explanation:

If it was 4y and 5y it would be like. Adding the x though makes them unlike terms, you cannot combine them

4 0

3 years ago

Dean ran 5 miles this week and wants to know how many kilometers he ran. His work is below.

Karo-lina-s [1.5K]

Answer:
A and D {: (edg 2021)
Step-by-step explanation:
I got it correct on my assignment! :D

8 0

2 years ago