When solving an inequality when is the sign reversed?

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

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.

Need showing work for this problem 56.25 ×25.80