Write the equation of an ellipse with vertices (0, 5) and (0, -5) and co-vertices (2, 0) and (-2, 0).

Step-by-step explanation:

From a sketch of the given coordinates, you notice that the ellipse has its center at (0,0) i.e origin

It is a vertical ellipse centered at (0,0),

The major axis has its coordinates at (0,a) = (0,5) and (0,-a) =(0,-5)

The minor axis has it coordinates at (0,b)=(0,-2) and (0,2)

Here a>b

The length of major axis is 2a = 2*5= 10

The length of minor axis is 2b= 2*2=4

Equation is given by

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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step-by-step explanation: 4 cause 2+2=4