11.14.11
At The Bell: PSSA: Lucia has 4 pairs of pants, 5 shirts and 2 sweaters. How many different three­piece outfits can she make?
A. Use proportions to find which two triangles are similar triangles. SHOW all your work.
6 cm
6 cm
4 cm
4 cm
1
2 cm
5 cm
2
5 cm
2 cm
3
3 cm
B. EXPLAIN how you solved this problem.
C. You learn that you can also use proportions to measure things that are too tall to measure directly. You go to the park in the afternoon and stand near an evergreen tree. The sun hits both you and the tree at the same time, so the heights and shadows form similar triangles. You measure the two shadows. EXPLAIN how you can use your height and the lengths of the shadows to find the height of the trees. Find the height of the tree. SHOW all your work.
5 ft.
4 ft.
20 ft.
A. Find the mode and median of the weekly rents. Show or explain all your work.
B. The hotel owner plans to advise using one statistical measurement that gives a fair representation of the weekly unit rents. He will use the mean. Find the mean (average) rent. Show or explain all your work. Explain why the mean does not fairly represent the weekly unit rents.
Assignment:
4­7 Practice & 4­8 Practice (ODDS Only!)