If the diameter is 12 inches, the radius is 6 inches, because the radius is half the diameter. When you fold the circle in half, the resulting figure has half the area.
The number of students that like at most 2 kinds of these chocolate candies can be gotten from subtracting the number of students that like more than 2 candies from the total number of high school students.
Since 34 like all three kinds of chocolate candy, hence:
Number of students that like at most 2 kinds of these chocolate candies = 500 - 34 = 466
466 students like at most 2 kinds of these chocolate candies
The pattern in the table adds 1.50 for ever 15 minutes. That means per minute it adds or 10 cents. This means you multiply each minute by 0.10 to find the cost. This is the equation c = 0.10m.