Andrew plays 1/4 of a song in 1/8 of a minute. how much time, in minutes, does it take him to play an entire song?

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?

Which of the following vectors are orthogonal to (2,1)? check all that apply