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3 years ago

Please please help please

Mathematics

1 answer:

il63 [147K]3 years ago

4 0

Answer:

6 times larger

Step-by-step explanation:

First, find the area of both.

Mary: 4*5.5=22

Lisa: 24*5.5=132

Then find what multiplied by 22 would equal 132. This is easy because it's a multiple-choice question.

22*20=440, so A is incorrect

We already know they are not equal, so then B can be crossed out

22*3=66, C would be incorrect

Leaving the only choice left to be the correct answer

22*6=132

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Q10: Determine the eccentricity, the type of conic, and the directrix for r = 11/6-5cos theta.

Marta_Voda [28]

Answer:

Eccentricity = 5/6

Type of conic section; Ellipse

Directrix; x = -11/5

Step-by-step explanation:

The first step would be to write the polar equation of the conic section in standard form by multiplying the numerator and denominator by 1/6;

$r=\frac{\frac{11}{6} }{1-\frac{5}{6}cos theta }$

The polar equation of the conic section is now in standard form;

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The eccentricity is clearly between 0 and 1, implying that the conic section is an Ellipse.

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e*d = 11/6

5/6*d = 11/6

d = 11/5

Since the denominator has a minus sign then the ellipse opens towards the right and thus the equation of its directrix is;

x = -11/5

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