The number of people in the United States who are at least 100 years old grew about 66% from 1980 to 2010. Write as a conditional statement. I'm usually pretty good with conditional statements but this doesn't make sense to me in terms of an if-then statement.

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

What is always true when two whole numbers are subtracted?

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years