I need help with these

What is the definition of cache and in what circumstances would it be appropriate to use it

Look up "racial violence in the early 1960's" and write information about it and find 3 sources about it

Which line is an example of perfect iambic pentameter? a. "i have been worth the whistle." b. "whose reverence even the head-lugg'd bear would lick," c. "a man, a prince, by him so benefited! " d. "ere they have done their mischief. where's thy drum? " e. "marry, your manhood, mew! "