100,000 bacteria die at a rate of 20% every 5 minutes the rate at wich the bacteria die B(t) can be represented by which of the following functions.( i have to create a exponetial function)

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?