PLZ HELP I WILL GIVE BRAINLIEST

1.) The population of a certain city decreased by 10,000 people.
Write a signed number to represent this population change.

2.) A car corporation produced 520 fewer cars this month than last.
Write a signed number to represent this month's change in production

Why do interests rates on loans to be lower in a weak economy than in a strong one

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?