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
ICE Princess25 [194]
3 years ago
15

The diameter of a circle is 9 cm. Find its area to the nearest tenth.

Mathematics
2 answers:
LuckyWell [14K]3 years ago
7 0

Answer:

63.6

Step-by-step explanation:

1. A = πr²

2. Find the radius (r). Since the radius of a circle is the diameter/2, the radius is 9/2, which is 4.5

3. Now that we know the radius, we plug it into our formula: A = π(4.5)²

4. Simplify: A = 3.14(20.25)

5. A = 63.62

6. Rounding to the nearest tenth makes your answer 63.6

Alja [10]3 years ago
3 0
<h2>63.6 cm</h2><h2 />

Cut diameter in half to find radius

9/2 = 4.5

radius = 4.5

This is the formula for area of a circle:

pi * radius^2

pi * 4.5^2

20.25pi

Now find pi:

20.25 * pi = 63.6

Answer:

63.6 cm is the area

You might be interested in
Math help please! Simplify: <br> √(4 + 16 + 16√3 + 12) = 4√(2 + √3)
lozanna [386]

Both sides equal each other. Do you want to know how?

√(4 + 16 + 16√3 + 12) = 4√(2 + √3)

Surd Rule: Numbers with the same surd can be added together. Therefore, all whole integers can be added together.

√(4 + 16 + 16√3 + 12)

√((4 + 16 + 12 )+ 16√3 ) =

√(32 + 16√3)

Simplify by Factorising the common factor - 16

√(32 + 16√3) ÷ 16

√(16 (2 + √3))

Square root 16. This is because it is a not a surd because it is not in it's simplest form.

√16 = 4

√4 (2 + √3)

3 0
3 years ago
A building is 70 feet tall. A blueprint of the building represents that length as 7 inches. What is the scale of the blueprint ​
matrenka [14]

Answer:

The scale of the blueprint is 10x smaller

Step-by-step explanation:

Divide. 70 divided by 7 is 10

8 0
3 years ago
Ill mark brainlyist!!!!
kumpel [21]

Answer: 30%

Step-by-step explanation:

   First, we will put completed over the total.

\frac{12}{40}

   Now, we will divide.

0.3

   Lastly, we will multiply by 100 to turn it into a percent.

0.3 * 100 = 30%

         You have ridden 30% of the course.

7 0
2 years ago
What is 78/10 expressed as a decimal?
SashulF [63]

Answer:

7.8

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
PLEASE HELP ASAPPPPP THANK YOU
Arada [10]

Answer:

i wish i could help u!!!!!!

Step-by-step explanation:

uuuhhhhh i hate that i kinda suck at math

anyway, i'll give this my best shot

The midsegment of a triangle is a line segment that connects the midpoints of two sides ofrigidity to structures. In the support for the image shown shown, the crossbar GJK is a midsegment of GFK

You can use a compass and straightedge to construct the midsegments of a triangle.

Hope this helps! It's the best i can do!

8 0
3 years ago
Other questions:
  • Solve the system by graphing: y=-3x-3 and y=2x+2. Make sure you write your answer as an ordered pair: (x,y)
    7·1 answer
  • What is th resulting true inequality ​
    5·1 answer
  • Can someone help me ? And show me the steps
    12·1 answer
  • What are the solutions to the system of equations graphed below?
    13·1 answer
  • Show a graph for -12x-3y=36
    10·2 answers
  • John Burroughs $6.50 from his friends to pay for snacks and $11. 75 from sister to go to the movies. How much money does he need
    15·1 answer
  • (3n-2)(4n+1)<br> how do i solve this by factoring?
    15·1 answer
  • HELP PLSSSSSSSS!!!! I’ll MARK YOU BRAINLY!!! AND NO LINK PLSSSSS!!! THANK YOU SO MUCH!
    12·2 answers
  • Given that f ( x ) = 3 x − 7 and g ( x ) = 3 x + 9 , evaluate f ( g ( 2 ) )
    14·1 answer
  • Jordan can clean 57 houses a week. Taylor can clean 27 houses in 3 days. If they work together, how many days
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!