Round 67,492,384 to the nearest million

Which expression is equivalent to 5r6141 2r+st6

In a tutoring session, 2/3 of an hour was spent reviewing math problems. adelina attended 3/4 of the tutoring session. how much time did adelina spend at the tutoring session?

If bill bought a home for $210,000 and he sold it a year later for $120,000 his percentage of loss is