Adrian said that 21.8 × 1.9 equals 41.42.
is adrian's answer reasonable?
a.
yes, adrian's answer is reasonable.
b.
no, adrian's answer should be closer to 0.4.
c.
no, adrian's answer should be closer to 4.
d.
no, adrian's answer should be closer to 400.

This is the form of a circle. Use this form to determine the center and radius of the circle.

(

x

−

h

)

2

+

(

y

−

k

)

2

=

r

2

Match the values in this circle to those of the standard form. The variable

r

represents the radius of the circle,

h

represents the x-offset from the origin, and

k

represents the y-offset from origin.

r

=

√

3

h

=

√

5

k

=

√

7

The center of the circle is found at

(

h

,

k

)

.

Center:

(

√

5

,

√

7

)

These values represent the important values for graphing and analyzing a circle.

Center:

(

√

5

,

√

7

)

Radius:

√

3