Answer:
C.
Explanation:
Radiation occurs whithout touching. This specific form of radiation is called thermal radiation.
Answer:
(x-4)(x-12)
Explanation:
+
Break the expression into groups

Factor out x from x^2 - 4x : 
Factor out -12 from -12x + 48: 
= x(x-4)-12(x-4)
Factor out common term x-4
= (x-4)(x-12)