THE ANSWER IS C IF I RECALL DOING THIS
Therefore, the decimal equivalent to the expression
is 50.02
The given expression is:

Note that 
The expression therefore becomes:
(5 x 10) + (2 x 0.01)
50 + 0.02
= 50.02
Therefore, the decimal equivalent to the expression
is 50.02
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6/12 = 1/2
x/22 = 1/2
2x = 22
x = 11
length of PW = 11
290, 9 - 0 = 9
BOOM your welcome