4. In a sequence of numbers, az = 16, az = 32, 24 = 64, as = 128, and ag = 256. Based on this information, which equation can be used to find the nth term in the sequence,
an?

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