Answer:
m = 35 g
Explanation:
The specific heat of a material can be calculated by the following formula:

where,
C = Specific Heat of Wax = 220 J/g
Q = Amount of Heat Supplied by the Heater = 7700 J
m = mass of wax melted = ?
Therefore,

<u>m = 35 g </u>
I think A but I dont really know
It depends on what it is closest to but I would say for instance black is 5 points and red is 6 if u land on the line 5.5