We have a garden that measures 17 feet by 20 feet. we want to pour concrete for a 3‐foot‐wide sidewalk around the garden. to make the forms for the concrete, we will need to buy some lumber. how many feet of lumber will we need just for the perimeter of the walk? (consider both the inside and the outside perimeter.)

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 −