How to convert rectangular to polar?
x²=y(8-y)

The Polar form  is  r = 8sin θ

Step-by-step explanation:

Explanation:-

Polar co-ordinates

              x = r cos θ    and      

               y=r sin θ      

now      

               tan θ =

Now given equation x²=y(8-y)

                                    ...(i)

now The equation(i)  convert to polar

                                      r² = 8(r sin θ)

                                      r = 8sin θ

Conclusion:-

The Polar form is  r = 8sin θ

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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