A store is advertising a 25% off sale. Mikale purchases a swimming pool for $225. What was the original price of the pool? A.
$450.75
B.
$300.00
C.
$655.50
D.
$281.25

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