find the cost price when selling price of an article is rupees rs 8640 and the profit percent is 20%

Which expression is equivalent to 5r6141 2r+st6

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?