2.) For the first one, your answer is correct, since he hikes 4 miles each day, and it take one hour to hike 4 miles, he hiked for 5 hours in five days.
3.) Jefferey buys 16 barrels of watermelons for his nephew, Sam, who eats 4 barrels every week. Jefferey spent $25.67 per bucket, and if Sam has $200 to pay back Jefferey for the watermelons, will he have enough to pay the price of the 16 barrels of watermelons?
The extra information is the detail that Sam eats 4 barrels of watermelons every week since it has nothing to do with the question the problem is asking: will Sam have enough money to pay back his uncle for the watermelons?
4.) Your answer is correct as is, he must know the amount of T-shirts he sells in one week in order to calculate how much profit he has if he already knows the price of his T-shirts and designs.
