Say all parts of a venn diagram are filled in how would one find the not explicitly shown information. for instance, three circles labeled a, b and c, could you find the value only in a, b or c, or those only shared by 2, so not all 3.
edit: i think i goofed up on how venn diagrams work

c

step-by-step explanation:

c

is there answer choices?

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.