11. The temperature at which the solid and liquid phases of matter exist in
equilibrium is called its
(1) melting point
(2) boiling point
(3) heat of fusion
(4) heat of vaporization

the answer is 303.15 or 303

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).