1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aivan3 [116]
2 years ago
14

Need help quick please. Find the area of the sector use 3.14 for pi

Mathematics
1 answer:
olga55 [171]2 years ago
7 0

\textit{area of a sector of a circle}\\\\ A=\cfrac{\theta \pi r^2}{360} ~~ \begin{cases} r=radius\\ \theta =\stackrel{degrees}{angle}\\[-0.5em] \hrulefill\\ r=9\\ \theta =120 \end{cases}\implies \begin{array}{llll} A=\cfrac{(120)\pi (9)^2}{360}\implies A=27\pi \\\\\\ \stackrel{using~\pi =3.14}{A\approx 84.8} \end{array}

You might be interested in
A sales manager collected data on annual sales for new customer accounts and the number of years of experience for a sample of 1
Nadya [2.5K]

Answer:

Kindly check explanation

Step-by-step explanation:

Given :

Years of experience (X) :

1

3

3

5

7

8

10

10

12

12

Annual sales (Y) :

85

97

95

97

105

106

122

120

113

134

The estimated regression equation obtained is :

y = b0 + b1x

b0 = 82.82967

b1 = 3.46061

ŷ = 3.46061X + 82.82967

The change in annual sales for every year of experience is given by the slope value, b1 = 3.46061 = 3.5 (1 decimal place)

The Coefficient of determination R² = 0.8477 = 0.848 ( 3 decimal place).

The Coefficient of determination gives the proportion of explained variance.

About 84.8% percent variation in annual sales can be explained by years of experience of the sales person.

Using the regression equation :

ŷ = 3.46061X + 82.82967

Years of experience, x = 8

ŷ = 3.46061(8) + 82.82967 = 110.514

111 = (to the nearest whole number)

4 0
3 years ago
Plz help I'm really bad at these
GREYUIT [131]
Y = mx + b, where m = slope = rise/run and b, the y intercept value

m = 1/1 = 1, then y = x + b.
We notice that y intercept is = - 1
And the equation is:

y = x - 1
6 0
4 years ago
Simplify to an expression of the form (a sin(θ)).<br> 2sin(/8)2cos(/8)
rjkz [21]

Answer:

Your expression equals 2 \sin(\frac{\pi}{4}) assuming the problem was to simplify 2\sin(\frac{\pi}{8}) 2\cos(\frac{\pi}{8}) to the form a\sin(\theta).

Step-by-step explanation:

2\sin(\frac{\pi}{8}) 2\cos(\frac{\pi}{8})

2(2)\sin(\frac{\pi}{8})\cos(\frac{\pi}{8})

Let's use the following identity: 2\sin(A)\cos(A)=\sin(2A)

2\sin(2 \cdot \frac{\pi}{8})

2 \sin(\frac{\pi}{4}) which is comparable to the form a\sin(\theta).

a=2

\theta=\frac{\pi}{4}

5 0
3 years ago
List three values that would make this inequality true 180 &gt; 15y
vodka [1.7K]
As long as the number plugged in Times 15 is less than 180, it works
Here are your three values: 1,2,3
8 0
4 years ago
Read 2 more answers
Solve for x. 2x+3=13
Gwar [14]

Answer:

The answer is 5

Step-by-step explanation:

First you subtract 3 from both sides and get 10. Then you divide by 2 and you get 5.

7 0
3 years ago
Read 2 more answers
Other questions:
  • What is <br> 5 times 20/25
    12·2 answers
  • I need help on this plzzz
    8·1 answer
  • (3.5x10^-2)+(7.9x10^2) answer in standard from ?
    15·1 answer
  • 3. Sandwich shop customers can choose the bread and meat they want.
    12·1 answer
  • How do I factor 25n^2 - 16?
    7·1 answer
  • What is the y-intercept of y=−3x−2
    13·1 answer
  • In triangle ABC, AB measures 25 cm and AC measures 35 cm. The inequality &lt; s &lt; represents the possible third side length o
    7·2 answers
  • Calculate the equivalent resistance Req of the network shown in Fig. 3.87 if R1 = 2R2 = 3R3 = 4R4 etc. and R11 = 3
    12·1 answer
  • A colony of 100 bacteria doubles in size every 60 hours. What will the population be 180 hours from now?
    12·1 answer
  • The high temperature on Monday was -9 degrees F. On Tuesday, the high temperature was 21 degrees F. Which integer represents the
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!