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WINSTONCH [101]
3 years ago
6

Using the formula C = 2, find the circumference of a circle with diameter of 20 inches. Round your answer to the nearest inch

Mathematics
2 answers:
Svetllana [295]3 years ago
8 0

Answer:

The circumference is approximately 314 inches.

Step-by-step explanation:

3.14 x r^2

3.14 x 10^2

3.14 x 100

Circumference: 314

Ivenika [448]3 years ago
4 0

Answer:62.8inches

Step-by-step explanation:

Diameter=20 inches

π=3.14

Circumference=π x diameter

Circumference=3.14 x 20

Circumference=62.8inches

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Describe the steps you would use to factor 2x3 + 5x2 – 8x – 20 completely. Then state the factored form.
WARRIOR [948]
The polynomial 2x^3 + 5x^2-8x-20 may have solutions which are the divisors of -20, therefore -20 has the following divisors: \pm 1, \pm 2, \pm 4, \pm 5, \pm 10, \pm 20.
If x=1, then 2\cdot1^3 + 5\cdot1^2-8\cdot1-20=-20\neq 0,
if x=-1, then 2\cdot(-1)^3 + 5\cdot(-1)^2-8\cdot(-1)-20=-9\neq 0,
if x=2, then 2\cdot2^3 + 5\cdot2^2-8\cdot2-20=0, then x=2 is a solution and you have the first factor (x-2). 
If x=-2, then 2\cdot(-2)^3 + 5\cdot(-2)^2-8\cdot(-2)-20=0, then x=-2 is a solution, so you have the second factor (x+2).
Since x-2 and x+2 are two factors of 2x^3 + 5x^2-8x-20 , then the polynomial x^2-4 is a divisor of 2x^3 + 5x^2-8x-20 and dividing the polynomial 2x^3 + 5x^2-8x-20 by x^2-4 you obtain 
 2x^3 + 5x^2-8x-20=(x-2)(x+2)(2x+5).











5 0
3 years ago
Read 2 more answers
What are two fractions equal to 2/5?
Georgia [21]
Two fractions that are equal to 2/5 are 4/10 and 6/15. In order to find fractions that are equal to it, just multiply both the numerator and the denominator by any number. I multiplied them by 2 and 3, to keep things simple.

2 x 2 = 4
2 x 5 = 10
4/10

2 x 3 = 6
5 x 3 = 15
6/15

Hope this helps!
8 0
4 years ago
Read 2 more answers
Hey i need help pls be honest. WILL GIVE BRAINLIEST!!!!!!!!
Gnoma [55]
12 x 12 = 144
20 x 12 = 240
=384

ANSWER: 384
6 0
3 years ago
ABC paint company needs to paint the outside of the building shown. They will also need to paint the roof. What is the surface a
Cloud [144]
Given:

An unpainted roof. Assuming the dimensions of the roof are 10 meters by 5 meters by 0.2 meters. To solve for the total surface area of the roof to be painted:

SA = 2 (wl + lh + wh)
SA = 2 ( 10*5 + 10*0.2 + 5*0.2)
SA = 106 square meters

3 0
4 years ago
Read 2 more answers
Find X Y and Z and please explain your reasoning :)
Yuri [45]

Answer:

X=84

Y=64

Step-by-step explanation:

84+64+32= 180

Triangles always equal 180

5 0
3 years ago
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