Write the expanded form of the following:
a) 21.061
b) 0.358
c) 506.0201
d)126.00

a) 21.061

20+1+0.0+0.06+0.001

b)0.358

0+0.3+0.05+0.008

c)506.0201

500+0+6+0.0+0.02+0.000+0.0001

d)126.00

100+20+6

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point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.