Manny needs to buy a bathroom mirror that is 2 feet wide and 5 feet long. If the mirror sells for $3.00 per square foot, what will the total cost of the mirror be?

The total area of the mirror is 2 feet x 5 feet = 10 square feet.

Therefore, the total cost of the mirror will be 10 square feet x $3.00/square foot = $30.00. Answer: \boxed{30}.