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zmey [24]
3 years ago
6

What is the radius of a circle whose area is equal to the sum of the areas of two circles whose radii are 20cm & 21cm?

Mathematics
2 answers:
Vika [28.1K]3 years ago
4 0

Answer:

29

Step-by-step explanation:

20^2 times 3.14= 1256

21^2 times 3.14= 1384.74

the sum of those two is 2640.74

the square root of that is 29

Xelga [282]3 years ago
3 0

Answer:

5cm

Step-by-step explanation:

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A 10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time t
xz_007 [3.2K]

Full Question

A 10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time t = 0, the resulting mass—spring system is disturbed from its rest state by the force F (t) = 20 cos(8t). The force F (t) is expressed in Newtons and is positive in the downward direction, and time is measured in seconds.

Determine the spring constant k.

Answer:

Spring Constant = 1000Nm^-1

Step-by-step explanation:

Given

Mass = 10kg

Spring Extension = 9.8cm

Spring Constant K = Force/Extension

Force = Mass * Acceleration

Force = 10 * 9.8 = 9.8N

Spring Extension = 9.8 cm = 9.8 /100 = 0.098 m

Spring constant = 98 / 0.098

Spring Constant = 1000Nm^-1

3 0
3 years ago
Put the following equation in Slope-intercept form. y=mx+b is the form you are looking for.
Elenna [48]

Answer:

y= -2x+23

Step-by-step explanation:

Subtract 2x over

7 0
3 years ago
Plz help and explain
Firdavs [7]
Id say the first one because the points just touch down
8 0
3 years ago
Classify the Polynomial by its number of terms.
Ivenika [448]

Answer:

it is a polynomial because it has more than two terms

3 0
2 years ago
After a picnic, 5/12 of the cornbread is left over. Val eats 4/5 of the leftover cornbread. What fraction of the cornbread does
Kay [80]

Answer:

5/12 - 4/5 = -23/60. You can't simplify -23/60. Hope this is right

Step-by-step explanation:

4/5= 48/60

5/12 =  25/60

25/60-48/60= -23/60

3 0
3 years ago
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