PLEASE HELP!! It takes Sheila 36 minutes to edit a commercial. How many commercials can she edit in 144 minutes?

With number 11 ( show how you got the answer)

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)