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Degger [83]
3 years ago
10

How do you find the radius of a sphere when you know the area

Mathematics
1 answer:
kotykmax [81]3 years ago
8 0
Since the area formula is pi times radius to the second power, then just plug in the things you know. for ex: The area is 314, then work backwards and divide 314 by pi which equals 100 then unsquare it which is 10 because 10*10=100. So the radius is 10
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The image point of A after a translation right 4 units and up 3 units is the point
e-lub [12.9K]

Answer:

(--6,-1)

Step-by-step explanation:

Right 4 units, to go back, left 4 units

Up 3 units, to go back, down 3 unites

Left : -2 - 4  = -6

Down : 2 - 3 = -1

4 0
3 years ago
The cost of a skateboard c after a 15% discount can be represented by the expression c−0.15c . Simplify the expression.
ohaa [14]

Answer:

0.85c

Step-by-step explanation:

To simplify the expression, subtract like terms:

c - 0.15c

= 0.85c

So, the simplified expression is 0.85c

5 0
3 years ago
Read 2 more answers
Please help me :)))))
svetoff [14.1K]
Part a)

Answer: 5*sqrt(2pi)/pi

-----------------------

Work Shown:

r = sqrt(A/pi)
r = sqrt(50/pi)
r = sqrt(50)/sqrt(pi)
r = (sqrt(50)*sqrt(pi))/(sqrt(pi)*sqrt(pi))
r = sqrt(50pi)/pi
r = sqrt(25*2pi)/pi
r = sqrt(25)*sqrt(2pi)/pi
r = 5*sqrt(2pi)/pi

Note: the denominator is technically not able to be rationalized because of the pi there. There is no value we can multiply pi by so that we end up with a rational value. We could try 1/pi, but that will eventually lead back to having pi in the denominator. I think your teacher may have made a typo when s/he wrote "rationalize all denominators"

============================================================

Part b)

Answer: 3*sqrt(3pi)/pi

-----------------------

Work Shown:

r = sqrt(A/pi)
r = sqrt(27/pi)
r = sqrt(27)/sqrt(pi)
r = (sqrt(27)*sqrt(pi))/(sqrt(pi)*sqrt(pi))
r = sqrt(27pi)/pi
r = sqrt(9*3pi)/pi
r = sqrt(9)*sqrt(3pi)/pi
r = 3*sqrt(3pi)/pi

Note: the same issue comes up as before in part a)

============================================================

Part c)

Answer: sqrt(19pi)/pi

-----------------------

Work Shown:

r = sqrt(A/pi)
r = sqrt(19/pi)
r = sqrt(19)/sqrt(pi)
r = (sqrt(19)*sqrt(pi))/(sqrt(pi)*sqrt(pi))
r = sqrt(19pi)/pi
8 0
3 years ago
Read 2 more answers
Rectangles. Please help!
nataly862011 [7]
First you have to canceled out the fours from both side 4x/4-12/4 so x=3 then you do the same thing to the 7x-18

4x-12.
4x/4-12/4. So x=3
The fours cancelled out

7x-18
7x/7-18/7. So x= 2 4/7
The sevens cancelled out

7 0
3 years ago
Please help I just need #5-8
olga_2 [115]
13 and i cant see number 8
7 0
3 years ago
Read 2 more answers
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