PLEASE HELP ASAP WILL MARK AS BRAINLEST A restaurant owner mixed the juices of 7 lemons with every 3 oranges to make a special drink Which ratio of lemons to oranges will make the same drink? A) 21:9 B) 15:35 C) 28:15 D) 42:21

Aliter of water contains about 3.35 x 10^25 molecules. a certain river discharges about 2.9x 10^8 l of water every second. about how many molecules does the river discharge every minute? write your answer in scientific notation