Points a and b lie on a circle centered at point o. if length of ab/radius= π/10, what is the ratio of the area of sector aob to the area of the circle?

a. 1/10

b. π/10

c. 1/20

d. π/20

C. \frac{1}{20}

Step-by-step explanation:

Given: Points A and B lie on a circle centered at point O.

We know that the angle of sector is given by :-

, where l is the length of sector and r is the radius of sector.

Thus,

The area of sector is given by :-

Now, the ratio of the area of sector AOB to the area of the circle is given by :-

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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3-4

step-by-step explanation:

the answer is 3-4 because both 45 and 60 has a multiple of 15.

45/3=15

60/4=15

therefore the odds against selecting a red is 4-3