Four band members, Harry, Isabel, Jose, and Karen, are all boarding a bus to attend a concert. In each arrangement below, the first initial of each person's name represents that person's position as he or she boards the bus: first, second, third, and fourth. If we know that Karen boards the bus first, which shows the possible outcomes for this event?

They boarded the bus in descending alphabetical order: Karen, Jose, Isabel and Harry

Step-by-step explanation:

In order of there name: Harry, Isabel, Jose, and Karen

If Karen was the first to board a bus, this means that Jose will be the second to board the bus, third is Isabel and Harry will be fourth.

It can be concluded that they boarded the bus in descending alphabetical order.

rounding to the nearest thousandth would be 452,000