Last week, Ralph’s gerbil drank 20 mL of water. This week he drank 16 mL of water. By what percent did the gerbil's intake of water decrease?

If the public debt of a country in 2009 was $10432000000000 and the budget for 2010 was in deficit by $201645000000, what was the public debt in 2010? do not include commas in your answer.

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom