ANNOUNCEMENT: QUIZ WEDNESDAY ON PROPORTIONS AND CONVERTING UNITS.
LOG PROBLEM
If you can drive 124 miles in 2 hours, how far can you drive in 7 hours? How far is that in kilometers? (1.61 kilometers = 1 mile)
WORK TODAY
We will be working on calculating ratios. We will also be defining absolute comparisons and relative comparisons.
ANSWERS to Rates and Ratios Problems
Page 9
People per telephone
37.98076923
76.92307692
1.699346405
20
1.301020408
1.89869281
130.979021
2.201754386
1.610526316
5.882352941
45.86206897
7.644067797
268.75
1.300147856
Telephones per person
0.026329114
0.013
0.588461538
0.05
0.768627451
0.526678141
0.00763481
0.454183267
0.620915033
0.17
0.021804511
0.130820399
0.00372093
0.76914329
Page 10
2a) United States and Finland rely on the telephone the most. They have the largest number of telephones per person. (They have the smallest number of people per telephone.)
2b) Sudan relies on telephones the least. They have the smallest amount of telephones per person. (They have the largest number of people per telephone.)
3a) People per telephone
4) France has way more telephones than the Solomon Islands.
Page 11
5a) China has more telephones.
5b) You would wait in a longer line in China because there are way less telephones per person in China.
6) The RELATIVE COMPARISON gives a much better picture because it includes people in the measurement of how many telephones there are in the country.
7) An absolute comparison would be useful for finding out how much of something a group of people use. A relative comparison would be useful for finding out how much of something an individual person uses.
HOMEWORK
Complete pages 9-11 in your Ratios and Rates Book.
