Sara saves her money in a jar. There is $200 in the jar. After 6 months, she has $590 in the jar. She puts the same amount of money into the jar at the
end of each month. How much money is Sara saving per month?

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)