The population of baltimore was 520,000 in 2000. now its 750,000. what was the change in population? what was the precent of change?

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?

While on a train trip, marsha noticed that there were 35 people in her train car. after the next stop, there were only 21 people in her car. if p represents the percent decrease in the number of people in marsha's train car, what is p?

Arecipe calls for 3 ounces of flour for every 2 ounces of sugar. find the constant of proportionality.