Kelsey painted one fourth of her bedroom in three seventh of an hour. at this rate, how long would it take her to paint the entire room?
three over twenty eight hour
twenty eight over three hours
twelve over seven hours
seven over twelve hour

The time it will take Kelsey to paint the entire room is:

It is given that:

Kelsey painted one fourth of her bedroom in three seventh of an hour.

This means that:

 1/4 of bedroom takes 3/7 of an hour

This means that the whole of the bedroom will take 4 times the time it took to cover 1/4 th of bedroom.

i.e. it will take:

Hence, the total time it will take to paint the whole room is:

                   twelve over seven hours  

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

idk

step-by-step explanation:

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