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Citrus2011 [14]
3 years ago
14

If a wheel has a diameter of 15 centimeters what is the area of the wheel nearest centimeter

Mathematics
1 answer:
maw [93]3 years ago
4 0

Answer:

<h2>A = 177 cm²</h2>

Step-by-step explanation:

A diameter is two times longer than a radius. Therefore, if the diameter

d = 15cm, then the radius r = (15cm) : 2 = 7.5cm.

The formula of an area of a circle:

A=\pi r^2

Substitute:

A=\pi(7.5)^2=56.25\pi\ cm^2

\pi\approx3.14

Then

A\approx(56.25)(3.14)\approx177\ cm^2

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2. There are 12 high schools competing in a basketball tournament. In how many ways can the teams be placed
joja [24]

Answer:

The teams can be placed in 479,001,600 ways.

Step-by-step explanation:

To solve this question, we want to know in how many ways 12 elements can be arranged.

Number of possible arrangements of x elements:

The number of possible arrangments of x elements is given by:

A_{x} = x!

In this question:

12 teams, so arrangment of 12 elements.

A_{12} = 12! = 479001600

The teams can be placed in 479,001,600 ways.

5 0
3 years ago
Step by step explanation:<br><br> 12b - b =77
ozzi

Answer:

7

Step-by-step explanation:

12b -b = 11b

11b = 77

Divide both sides by 11

b = 7

8 0
3 years ago
Read 2 more answers
76X3 WHAT IS IT IM LAZY RN LOL
GaryK [48]
Your answer is going to be 228
4 0
3 years ago
Read 2 more answers
Which of the following formulas is used to find the circumference of a circle?
GrogVix [38]

Answer:

D

Step-by-step explanation:

The formula for calculating circumference (C) are

C = 2πr ( r is the radius ) → D

or

C = πd ( d is the diameter )

7 0
3 years ago
Help quick please. Order the numbers from least to greatest.
Anastasy [175]

Answer:

-2\frac{1}{4}

Step-by-step explanation:

Mod of any number represents the absolute value of the number.

Therefore, |-2\frac{1}{4}|=2\frac{1}{4} = 2.25

-2\frac{1}{4}=-2.25

|1\frac{1}{4}|=1.25

\frac{3}{4}=0.75

|-1\frac{3}{4}|=1\frac{3}{4}=1.75

-1\frac{1}{4}=-1.25

Now we can arrange these numbers in ascending order.

-2.25 < -1.25 < 0.75 < 1.25 < 1.75 < 2.25

Therefore, -2\frac{1}{4}

4 0
3 years ago
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