A petri dish originally contained
2,500 bacteria. After one hour, the
number of bacteria is one-third the
original amount. What equation can be
used to determine the time that elapses
until only 500 bacteria remain?

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

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Fa bus driver leaves her first stop by 7: 00 a.m., her route will take less than 37 minutes. if she leaves after 7: 00 a.m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?