First, subtract the monthly fee from the October bill, which would be $52.50.
Now, divide this by $0.10.
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2x^2 - 8 = 0
2x^2 = 8
x^2 = 8/2 = 4
x = sqrt(4) = 2 or -2
Answer
0.44
Step-by-step explanation:
Convert to a fraction, then convert to a decimal by dividing the numerator by the denominator.
