Ascience teacher needs to choose 4 students from a class of 20 to go to the library to do some research. how many different groups can be selected?
a.) 3,060
b.) 104,976
c.) none are correct
d.) 73,440

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq