Plz help me I am timed : ( What is the mean of these numbers?
80, 900, 20, 40
OA) 30
OB) 45
O C) 50
OD) 60

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay

3.4a=57.8 what is the the value of a