What is the value of b?
22.5
11.25
12
6

11.25

Step-by-step explanation:

The perpendicular drawn on chord passes through the center of a circle divides the chord in to two equal parts

Refer the attached figure

So, By theorem AB = BC and DE = EF

In ΔFEO and ΔCBO

OE = OB(Given )

FO=CO(Radius of circle) (Hypotenuse of right angled triangle)

∠OEF=∠OBC =90°(right angle)

So, ΔFEO ≅ ΔCBO By RHS property

So, EF=BC(corresponding parts of congruent triangles are congruent)

BC =

So,  EF=11.25

So, Value of b is 11.25

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*

It is e) i am not sure if you have any questions or need any