Afraction that is a repeating decimal between 0.5 and 1

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

The table showed price paid per concert ticket on a popular online auction site. what was the average price paid per ticket