Ben, Cam, and Justin are lumberjacks. The number of trees they chop down is given by
where
is the number of hours Ben spends chopping,
is the number of hours Cam spends chopping, and
is the number of hours Justin spends chopping.
How many trees do they chop down after Ben spends
hours chopping, Cam spends
hours chopping, and Justin spends
hours chopping?
trees