Find the missing length.

A. 25
B. 15
C. 16
D. 20

How can you find the conditional probability of a given b as the fraction of b’s outcomes that also belong to a, and interpret the answer in terms of the model? i just need a good explanation

Factor this polynomial completely x^2-64

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?