The foci of an ellipse lie on the major axis of the ellipse

Answer with explanation:

Equation of ellipse in two forms

So, there are two cases.

1. When , a > b

Major Axis = X axis

Minor Axis =Y axis

Focus , lies on the Major Axis that is on X axis.

2. When, a < b

Major Axis = Y axis

Minor Axis = X axis

Focus lies on the Major axis, which is Y axis.

So, In both the cases ,the Focus lies on Major Axis.

e) none of the above because the measure of angle cba is 101°

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6