At the beginning of a population study, a city had 270,000 people. Each year since, the population has grown by 4.9%. Lett be the number of years since start of the study. Let y be the city's population.
Write an exponential function showing the relationship between y and t.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?