Thirteen people are entered in a race. If there are no ties, in how many ways can the first three places be awarded?

Answer:

81π

Step-by-step explanation:

To find the area of a circle, the formula is πr^2

r=radius, and radius is half the diameter, so it is 9.

Plug the radius into the formula to get 81π

(9^2*π)

If this answer helped you, I would greatly appreciate the brainliest :D

Answer:

b

Step-by-step explanation:

b is correct i think

2

Answer:

68.7

Step-by-step explanation:

Lets say this triangle is represented as ABC.

AB = BC

So:

23+23+22.7 = p

p = 68.7

Answer:

-x + 1

Step-by-step explanation:

f(x) = 2x + 3

g(x) = 3x + 2

we want to find (f-g)(x)

(f-g)(x) is the same as saying f(x) - g(x)

f(x) - g(x) = (2x + 3) - (3x + 2)

==> remove parenthesis and apply negative sign

f(x) - g(x) = 2x + 3 - 3x - 2

==> combine like terms

f(x) - g(x) = -x + 1

Put values

Answer:

X=121, y=59, w=59, z=53

Step-by-step explanation:

To find w, we know that the interior angles of a triangle are 180°. Thus ↓

180-31-90=59

For y, we know that y and w are opposite angles. Therefore, y = w = 59.

To find x, we know that there is a one straight line, so therefore we use ↓

180-59=121

Lastly, to find z, we know that the interior angles of a triangle are 180°. Thus ↓

180-59-68=53

I've attached a photo for better understanding. Hope this helps =)

Answer:

It's B

-10 + 6

Step-by-step explanation:

Here, we gotta use the distributive property.

the -2 will distribute to the 5, which will make the -10

then, the -2 will also distribute to the -3 (the minus is the negative) which will make the 6

So, that should give you the -10 + 6, which is B

hope this helped :)

Answer:

Step-by-step explanation:

Use the distributive property.

Distributive property:

→ A(B+C)=AB+AC

→ -2(5-3)

Multiply.

→ -2*5=-10

→ -2*3=-6

Rewrite the problem down.

→ = -10+6

I hope this helps you! Let me know if my answer is wrong or not.

Answer:

15-n

Step-by-step explanation:

subtract the number that flew away from the total number of birds that were there

Using the histogram, it is found that about 10% of students took less than 40 minutes to complete the exam.

An histogram is a graph that shows the number of times each element of x was observed.

Researching the problem on the internet, it is found that the histogram states that:

10% of 29 is approximately 3, hence about 10% of students took less than 40 minutes to complete the exam.

More can be learned about histograms at https://brainly.com/question/25836450

#SPJ1

Answer:

[tex]she \: used \: 1.695 \: kg \: of \: flour.[/tex]

Step-by-step explanation:

[tex]2.64 - 0.945 = 1.695[/tex]

Answer:

c = 53.85 or 54

Step-by-step explanation:

Answer: I believe the answer is C. (-3,4)

Step-by-step explanation:

Answer:

A = 240 units²

Step-by-step explanation:

the area (A) of a regular polygon is

A = [tex]\frac{1}{2}[/tex] pa ( p is the perimeter and a the apothem )

here p = 8 × 6 = 48 ( an octagon has 8 sides ) and a = 10 , then

A = [tex]\frac{1}{2}[/tex] × 48 × 10 = 24 × 10 = 240 units²

Answer:

Step-by-step explanation:

Preliminary task

Draw a regular octagon.

Draw a perpendicular from the side's midpoint to the center. (That is the  apothem).

Draw two radii from the center of the side to the center of of the octagon. The endpoints of these two radii is the endpoints of the octagon's side.

The octagon has 8 such triangles.

Area one triangle

Area = 1/2 * side *  apothem

side = 6

apothem = 10

Area = 1/2 6 * 10

Area = 30

Area of 8 such triangles.

Area = 8 * area of 1 triangle

area 1 triangle = 30

Area of 8 such triangles = 30*8 = 240

Answer 240

Answer:

•construction of buildings

•Interior designs

•Art

•Measuring of orbits and planetary •motions Interior designs

Answer: 5 units

Step-by-step explanation:

5/2 = 2.5

they are 2.5 away on each side of 0 therefore the points are 5 units away from each other

Answer:

This is pythagoras

A squared plus b squared equals c squared.

The unknown side is c as its the hypotenuse,

So the length of the first side is 6.4 this squared = 40.96

The other length is 12 as 6 is the radius so the diameter of the circle amd therfore the length of the triangle is 12.

12 squared is 144

144 + 40.96 = 184.96

The length of c squared is 184.96

To find the length of c alone we calculate the square root.

The square root of 184.96 = 13.6

? = 13.6

Step-by-step explanation:

the area of a triangle is

baseline × height / 2

the baseline (where the height hits at a 90° angle) is 4 m.

the height is 3.7 m.

so, the area is

4 × 3.7 / 2 = 2 × 3.7 = 7.4 m²

Answer:

[tex] \frac{1}{20} [/tex]

or 5%

Step-by-step explanation:

Explanation:

3/4=15/20

1/5=4/20

So, rest of 'em 1/20

Answer:

1/20.

Step-by-step explanation:

1 - 3/4 - 1/5

= 20/20  - 15/20 - 4/20

= 1/20

Answer:

B -- 232

Step-by-step explanation:

because you can divide 232 by 4 and get a whole number.

Answer:

d = 60t

Step-by-step explanation:

distance = d

time = t

every hour 60 miles are travelled so its 60t

referring to 60*time eg 60*3 = 180

Step-by-step explanation:

Degree is 6

Leading coefficient is 5

Constant term is 8

Answer:

m=117

Step-by-step explanation:

So this area is 360 degrees

What you can see the 68 degrees is congruent to its opposing side so we can eliminate those. 360 - 126= 234

We can see m is congruent to U

234/2=117

m=117

Answer:

0.52

Step-by-step explanation:

[tex]batting \: average \: = \frac{39}{75} \\ = 0.52[/tex]

Answer: D

Step-by-step explanation:

Answer:

m=1

Step-by-step explanation:

(2,5);(−6,−3)

(x1,y1)=(2,5)

(x2,y2)=(−6,−3)

Use the slope formula:

m=

y^2−y^1

x^2−x^1

=

−3−5/−6−2

=

−8/−8

=1

Answer:

m=1

Answer:

[tex]\boxed{\sf{1}}[/tex]

Step-by-step explanation:

To solve this problem, you have to use a slope formula.

Slope formula:

[tex]\Longrightarrow: \sf{\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{Rise}{run} }[/tex]

[tex]\sf{y_2=(-3)}\\\\\sf{y_1=5}\\\\\sf{x_2=(-6)}\\\\\sf{x_1=2}[/tex]

Rewrite the problem down.

[tex]\sf{\dfrac{(-3)-5}{(-6)-2} }[/tex]

Solve.

[tex]\sf{\dfrac{(-3)-5}{(-6)-2}=\dfrac{-8}{-8}=\boxed{\sf{1} }[/tex]

I hope this helps you! Let me know if my answer is wrong or not.

Answer:

see explanation

Step-by-step explanation:

45,612 × [tex]\frac{1}{2}[/tex] = 22,806

Thus Beth sold half the number of books that Rodney sold

(4)

[tex]\frac{1}{2}[/tex] × 2,175 = 1,087.5 < 2,175

Answer:

1. √144 2.√16 3.√289

= 12 = 4 = 17

4. √(4/81) 5. √25 6. √400

= 0.222 = 5 =20

7. 3√27 8. 3√-8 9. 3√216

= 15.588 = -2 = 6

10. 3√343 11. 3√-1000 12. 3√1

= 7 = -10 = 3

________________________________

13. √112

= solution,

Cube roots, square roots,

3√112 2√112

= 3√(2x2x2)x2x7 = 4√28

= 2 ∛14 = 4√7

= 4.82

14. √20

=

Answer:

Its d

Step-by-step explanation:

because you square 10 and you get 100 and you have to multiply 6 with 100 which is 600 and then you multiply the 3.14 which gives you 1,884

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