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
dimulka [17.4K]
2 years ago
14

If the diameter of a circle is 20 cm, what is the area?

Mathematics
2 answers:
EastWind [94]2 years ago
5 0

Answer:

Half of 20 is 10(New radius)

10^2(radius squared) = 100

100pi is your next step, which is 100π cm2

Formula area of a circle:

πr^2

pi(3.14 or 22/7 depending on what they tell you to use for pi) x radius(half of your diameter or given radius) squared(to the power of 2)

Pi x radius being squared

katovenus [111]2 years ago
3 0

Answer:

A = 100 pi cm^2

Step-by-step explanation:

A = pi(r^2)

A = pi(10^2)

A = pi(100)

A = 314.16 '

Convert to pi units.

314.16 ---> 100pi cm^2

You might be interested in
In an instant lottery, your chances of winning are 0.1. if you play the lottery five times and outcomes are independent, the pro
lesya692 [45]

The probability that you lose all five times will be 0.59.

<h3>How to calculate the probability?</h3>

From the information given, the chances of winning are 0.1. Therefore, the chance of losing will be:

= 1 - 0.1 = 0.9

Therefore, the probability that you lose all five times will be:

= 0.9 × 0.9 × 0.9 × 0.9 × 0.9

= 0.59

Learn more about probability on:

brainly.com/question/24756209

#SPJ1

6 0
2 years ago
Compare and Contrast how you would factor x^2−9 and x^2+9. For full credit, make sure you explain why they are factored differen
marishachu [46]

The factored form of the expression x^2 - 9 is (x+3)(x-3)

The expression x^2 + 9 has no real roots hence cannot be factored

Quadratic equations are equations with a degree of 2.

Given the quadratic function x^2-9 \ and \ x^2+9

For the function x^2 - 9

=x^2-9\\=x^2-3^2

Using the difference of two squares:

a^2-b^2=(a-b)(a+b)\\x^2-3^2=(x-3)(x+3)

For the expression x^2 + 9

The expression x^2 + 9 has no real roots hence cannot be factored

Learn more on factorization here: brainly.com/question/20293447

7 0
2 years ago
(2t–3x)4 expand using binomial theorem​
STatiana [176]
639293!47,behdjdkevejskksnsbwjajMsbdhcifmensbjxocnfndoxold
5 0
2 years ago
An 80% confidence interval is (150, 170). What is the margin of error?
Viefleur [7K]

Answer:

10

Step-by-step explanation:

it is what it is

5 0
3 years ago
7.
nikitadnepr [17]

Answer:

$46

Step-by-step explanation:

40(0.15) = 6 (this is the amount of the tip)

40 + 6 = 46 (add the tip to the bill)

7 0
3 years ago
Other questions:
  • The coordinate plane below represents a city. Points A through F are schools in the city.
    14·1 answer
  • before you get paid this week,your Bank balance read $ -9.55. your paycheck was $136.32. before your next paycheck, you have to
    9·1 answer
  • Susan throws a softball upward into the air at a speed of 32 feet per second from a 24 dash foot platform. the distance upward t
    10·1 answer
  • (0,1)<br> (1,0.5)<br> (2,0.25)<br> (3,0.125)<br> (4,0.0625)<br> What does Y equal in this function)
    10·1 answer
  • Hey yooo i need help check
    13·1 answer
  • After reaching the summit, she descends 14 feet in 213 minutes. If she continues at this rate, where will Maggie be in relation
    7·1 answer
  • Pls help plz plz plz dont be mean
    9·1 answer
  • 5 times 2/3 is ? For Matthematics please and ty
    13·2 answers
  • 5/9 x 8/11 as a fraction
    13·2 answers
  • Triangle ABC has coordinates A(−6,2), B(−3,6), and C(5,0). Find the perimeter of the triangle. Round your answer to the hundredt
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!