E=mc squared means energy equals mass times the speed of light squared, on the most basic level, the equation says that energy and mass (matter) are interchangeable. they are different forms of the same thing.
The answer that is true about connotative meanings is A) they describe the feelings or associations that words create.
B) is denotation, not connotation.
C) is incorrect because you can have multiple connotative meanings.
D) is also incorrect because a word may evoke positive feelings in one person, and negative in another.
A prefix is usually added directly to the base word but there several case where a hyphen is needed.