The united states population of gray wolves was 1170 in 1991. if the population is decreasing by 5% each year, how long before there are only 300 left?

need this asap! you so much!

The water company charges a residential customer $41 for the first 3,000 gallons of water used and $1 for every 200 gallons used over 3000 gallons. if the water bill was $58 how many gallons of water were usedanswersa 3400 gallonsb 6000 gallonsc 6400 gallons d 7000 gallons