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velikii [3]
3 years ago
12

Find the circumference and the area of a circle with radius 4 cm Please help!

Mathematics
2 answers:
Alexus [3.1K]3 years ago
5 0
Circumference: 2 * pi * r
pi = 3.14, r = 4
2 * 3.14 * 4 = 25.12
Circumference: 25.12 cm

Area = pi * r^2
pi = 3.14, r = 4
3.14 * 4^2 = 50.24
Area: 50.24 cm^2
Akimi4 [234]3 years ago
3 0

Answer:

Circumference: 8πcm

Area: 16πcm²

Step-by-step explanation:

Circumference:

To find the circumference of a circle, use the formula c = 2πr, where r is the radius. Use 3.14 for pi.

r = 4

c = 2πr

c = 2(3.14)r

c = 2(3.14)4

c = 25.12cm

Area: To find the area of a circle, use the formula πr², where r is the radius. Use 3.14 for pi.

r = 4

a =  πr²

a = (3.14)r²

a =  (3.14)4²

a =  (3.14)16cm²

a = 50.24 cm²

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40 x 100L which is wrong but i need points

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3 years ago
On Sunday, a local hamburger shop sold a combined total of 378 hamburgers and cheeseburgers. The number of cheeseburgers was sol
ipn [44]

Answer:

The number of hamburgers sold was 126.

Step-by-step explanation:

Let h = number of hamburgers sold

let c = cheeseburgers sold

c+h = 378

c = 2h

Substitute c =2h into c+h =278

c+h =378

2h+h = 378

Combine like terms

3h = 378

Divide by 3

3h/3 =378/3

h =126

The number of hamburgers sold was 126.

5 0
3 years ago
My daughter needs help and I don't understand the question ethier.
WINSTONCH [101]

So firstly, let's figure out the expression for a singular goody bag. Since there's 2 of each item, a single goody bag is going to be (1.07*2+0.85*2+2.12*2)

Now since we have 7 friends who are all getting 1 goody bag, multiply the cost of the goody bag by 7, and our expression is 7(1.07*2+0.85*2+2.12*2) . Now we can solve it from there.

Firstly, solve the multiplication inside the parentheses: 7(2.14+1.7+4.24)

Now add up what's inside the parentheses: 7(8.08)

Lastly, multiply and <u>your answer will be $56.56</u>

3 0
3 years ago
The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a ru
ioda
Let width of the floor be x feet, them area is
x(x+2)  = 168
x^2 + 2x - 168 = 0
(x - 12)(x + 14) - 0
so x = 12
the floor is 12 ft by 10 ft

the width of the rug should be 10 - 2(2) = 6 feet


4 0
3 years ago
Nolan Walker decided to buy a used snowmobile since his credit union was offering such low interest rates. He borrowed $2,700 at
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Using the formula for simple interest, it is found that he paid $119.87 in interest.

The<u> simple interest formula</u> is given by:

E = PIt

  • E is the amount of interest earned.
  • P is the principal(the amount of money invested).
  • I is the interest rate(yearly, as a decimal).
  • t is the time, in years.

In this problem:

  • Borrowed $2,700, thus P = 2700
  • Interest rate of 3.5%, thus I = 0.035
  • From December 26, 2019 to February 21, 2021, there were 423 days, thus the time in years is t = \frac{423}{365} = 1.2685

Thus, the interest paid was of:

E = PIt = 2700(0.035)(1.2685) = 119.87

$119.87.

A similar problem is given at brainly.com/question/9593067

5 0
2 years ago
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