Tom surveyed the 105 family members and found 4/5 of them have pets. how many family members have pets

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

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?

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.