In 1980, the population of a town was 21,000 and in 1990 it was 20,000. Assuming the population decreases continuously at a rate proportional to the existing population, estimate the population in 2010.

Brent works part-time at a clothing store. he earns an hourly wage of $15. if he needs to earn more than $45 in a day and works for x hours a day, which inequality represents this situation? a. 15x > 45 b. 15x < 60 c. x > 60 d. 15x < 45 e. x < 60

An angle that measures between 90 and 180° is called a(,

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16