Hector is 5 years less than double mary's age mary is 12 years old how many years old is hector

19 years old double her age is 24 then you subtract 5. 19

Hector is 19 years old.

12 x 2 = 24 - 5 = 19

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

boxplot e is the answer