Based on the tree diagram below, what is the probability that a student doesn't have lice, given that the student tested negative? round your answer to the nearest tenth of a percent.

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Precalculus question, image attached.