For all of the 6 weeks she has been volunteering for 119 hours in total. (I know I’m restating the problem, but I just want to make sure that it’s clear)
119 hours divided by 6 weeks=19.8333333
Because this is a repeating decimal sign, and it says to estimate, I would round up because it’s closer to 19 hours each week
than 18 hours each week.
Answer: 19 hours per week