Question 803065
Too many exercises for help requested here, but help already given for the two parts 102 question.

See http://www.algebra.com/algebra/homework/word/numbers/Numbers_Word_Problems.faq.question.803066.html


As for the other three problems, they are uniform rates problems.  They are based on the idea, {{{(ratio)*U=D}}}, where "ratio" is equivalent to {{{U/D}}}, and U has its particular unit and D has its own unit.  Often but not always, the "D" has units of time.