The number of bacteria in a Petri dish doubles every month. If the dish started with 450 bacteria, how many will there be in 1 year?

Which of the choices shown could be used to prove that aacp=abcp ?

Express -5 2/5 as an improper fraction.

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?