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
Lelu [443]
3 years ago
5

Anyone help!!!! Please I grant brainliest.

Mathematics
2 answers:
lakkis [162]3 years ago
7 0

Answer:

hope this helps you.........

Masja [62]3 years ago
4 0

Length of arc = 11 cm

Answer:

Area of sector =115.5 square cm

Step-by-step explanation:

Length of arc =  \frac{30 \degree}{360 \degree}  \times 2 \times  \frac{22}{7}  \times 21 \\  \\  = \frac{1}{12}  \times 2 \times  22  \times 3 \\  \\  = \frac{1}{12}  \times 6 \times  22\\  \\  = \frac{1}{2}  \times  22\\  \\  = 11 \: cm \\  \\  \\  \\ area \: of \: sector =  \frac{ 30 \degree}{360 \degree}  \times \pi {r}^{2}  \\  \\  =  \frac{1}{12}  \times  \frac{22}{7}  \times  {21}^{2}  \\  \\  =  \frac{1}{12}  \times  \frac{22}{7}  \times 21 \times 21 \\  \\  = 115.5 \:  {cm}^{2}  \\

You might be interested in
What I use the Pythagorean theorem for this problem?
andrew-mc [135]
No you would not use the Pythagorean Theorem, You would take the two sides and multiply them together, and divide it by 2.
8 0
3 years ago
The data set represents the number of rings each person in a room is wearing.
MrRa [10]
If the data set represents the number of rings each person is wearing, being: 0,2,4,0,2,3,2,8,6, the interquartile range of the data is 2. Being, 4 as the Q1, 3 as the Q2 or median, and 6 as the Q3. Where the formula of getting the interquartile range is IQR= Q1-Q2.
3 0
3 years ago
Read 2 more answers
Write explicit formula for a1=3, r=-2; then generate 1st 5 terms
Crazy boy [7]

Answer:

  • an = 3(-2)^(n-1)
  • 3, -6, 12, -24, 48

Step-by-step explanation:

These variable names, a1, r, are commonly used in relationship to geometric sequences. We assume you want the terms of a geometric sequence with these characteristics.

a1 is the first term. r is the ratio between terms, so is the factor to find the next term from the previous one.

  a1 = 3  (given)

  a2 = a1×r = 3×(-2) = -6

  a3 = a2×r = (-6)(-2) = 12

  a4 = a3×r = (12)(-2) = -24

  a5 = a4×r = (-24)(-2) = 48

The first 5 terms are 3, -6, 12, -24, 48.

__

The explicit formula for the terms of a geometric sequence is ...

  an = a1×r^(n -1)

Using the given values of a1 and r, the explicit formula for this sequence is ...

  an = 3(-2)^(n -1)

6 0
3 years ago
What is the area of this triangle?
Contact [7]

Answer: 43.5

Step-by-step explanation:

A=\frac{1}{2}(8)(12)(\sin 65^{\circ}) \approx \boxed{43.5}

6 0
2 years ago
Find the perimeter of the polygon.
Kaylis [27]

Answer:

I think it's 150

Step-by-step explanation:

(8+7) × 10 = 150

8 0
3 years ago
Other questions:
  • Solve ax − by = f for y
    9·1 answer
  • Evaluate a/z+bw^2 for a=21 b=3 w=6 z=7
    9·1 answer
  • Which of the following statements are true. Select all that apply
    11·2 answers
  • What is the measure of NET?<br><br> 50°<br> 65°<br> 90°<br> 130°
    15·1 answer
  • Helpp!!!!!!!!!!!!!!!!!....
    15·1 answer
  • One less than twice a number x is more than 5.
    12·2 answers
  • Find the mean absolute deviation in the following data set: 23, 42, 36, 63, 31
    12·2 answers
  • Write an equation for the exponential function represented in the table below
    10·1 answer
  • Determine the unknown side lengths.<br><br> X= ?<br><br> Y= ?
    9·2 answers
  • In a class of 27 students, 14 play an instrument and 16 play a sport. There are 6
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!