2/10 (or 1/5) times 2/10 (or 1/5)
This will equal 1 out of 25 chance.
You take the number of items you are looking for (for example, 2 tomato cans) divided by the total items you have (all 10 cans that are a possibility.) then you take your probabilities, and multiply them.
I believe it should be 0.5 x 7 as that is in a bracket and you have to deal with the bracket first before dealing with numbers outside the bracket.
The slope is positive
Every additional hat produced results in a cost increase of $0.60.
Before producing any hats, the manufacturing costs are about $100.00
It's easy to show that
is strictly increasing on
. This means

and

Then the integral is bounded by

