147 is 35%of what number?
a. 51.45
b.420
c.514.5
d.4,200

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?