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
valentinak56 [21]
2 years ago
10

Please give me the answers to all three I will mark u brilliant

Mathematics
1 answer:
elixir [45]2 years ago
4 0

Answer:

First know the formula for the area of a circle;

<h2>A = πr^{2}</h2>

Where 'π' represents pi(3.14 or 22/7), and 'r' stands for the radius being squared.

For the first problem, we can see that 12 is our <u>diameter</u>.

And to find the radius, we need to find 1/2 of the diameter (half of the diameter), so;

D/2 = R

Replace with actual values;

12/2 = 6, <u>6</u> is our <u>radius</u>.

Now we plug this into our formula:

A = πr^{2}

A = 3.14(6^2)

A = 3.14(36)

A = <u>113.04 centimetres</u> is the area of the circle.

For the second problem, we can see that 18 is our <u>diameter</u>.

And to convert the diameter into the radius, we do what we did to the past problem, find 1/2 of the diameter.

So;

D/2 = R

18/2 = 9, <u>9</u> is our <u>radius</u>.

Now we plug this into our formula:

A = πr^{2}

A = 3.14(9^2)

A = 3.14(81)

A = <u>254.34 inches</u> is the area for this circle.

For the third problem, we can see that our radius is already given, 5.

So now we just simply and easily plug this into our formula;

A = πr^{2}

A = 3.14(5^2)

A = 3.14(25)

A = <u>78.5 meters</u> is the area for this circle.

You might be interested in
A cylinder has a diameter of 40 feet and a height of 32 feet. What is the surface area of the cylinder? Express the answer in
mafiozo [28]

Answer:

6524.51 ft^2

Step-by-step explanation:

The surface area of a cylinder is given as;

SA = 2\pi rh + 2\pi r^2

where r = radius

h = height

The cylinder has a height of 32 feet and a diameter of 40 feet. This means that the radius is:

40 / 2 = 20 feet

The surface area is therefore:

SA = (2*\pi* 20 * 32) + (2*\pi *20^2)\\\\SA = 4021.24 + 2513.27\\\\SA = 6524.51 ft^2

The surface area of the cylinder is 6524.51 ft^2.

5 0
3 years ago
Given that f(x) = 5x+3 and g(x) = x²-3.<br>Find<br>a f(4)<br>b) f(g(x))<br>C). g( f (2))​
frosja888 [35]

Answer:

given;

f(x) = 5x+3

g(x) = x²-3.

Step-by-step explanation:

a f(4)=5×4+3=23

b) f(g(x))=f(x²-3)=5{x²-3)+3=5x²-15+3=5x²-12

C). g( f (2))=g(5×2+3)=13²-3=166

6 0
2 years ago
Can someone please answer these (real answers only)
adell [148]
5. The number of visitors increase in April, spike in August and then decrease in September.

6. December is in winter, therefore many people do not travel during December.

7. There are not a lot of holidays in February and March, so people are either working or going to school instead of visiting.

I hope this helped!
4 0
2 years ago
Read 2 more answers
Applications of integers (PLEASE HELP)
Amiraneli [1.4K]

Answer:

I can try to answer.

Step-by-step explanation:

1. 23

2. 25

3. week 4 is 29, and week 3 is 23

29-23=6

4. week 5 and 7 because on week 4 it was 29, it dropped to 25 on week 5. On week 6 it was 37, then dropped to 34 on week 7.

Im not rlly sure about 5, but ill answer it if I figure it out.

5 0
2 years ago
Find the solution of this system of equations. -x - 5y= 30, 10x + 5y= -75
madreJ [45]

Answer:

x=-5, y=-5. (-5, -5).

Step-by-step explanation:

-x-5y=30

10x+5y=-75

------------------

9x=-45

x=-45/9

x=-5

-(-5)-5y=30

5-5y=30

5y=5-30

5y=-25

y=-25/5

y=-5

7 0
3 years ago
Other questions:
  • What square footage of artificial grass is needed to cover this portion of the course?
    13·2 answers
  • HELP MEEE ON THIS MATH PLSSS
    7·2 answers
  • Ten frogs can catch 10 flies in 10 minutes. How long would it take one frog to catch one fly?
    8·1 answer
  • Find 2% of 14. Do not round your answer
    10·1 answer
  • Find the value of 18 ÷ 9 ∙ 3
    6·2 answers
  • Help ASAP! Right answer will be marked BRAINLIEST!!!
    6·1 answer
  • What % of 30 is 16.5
    11·2 answers
  • Expand and simplify (x + 3)(x-4)
    14·2 answers
  • (5) to the 7 over 3 power
    14·1 answer
  • Find the equation of the line y=mx+b form with the slope 3 that passes through the point (5,19)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!