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neokeynesian
10-20-2004, 03:23 AM
1)Team X scored 10 points in the first half of a certain game. In the second half of the game, team Y scored 15 points more than team X.

Col A
The number of points scored by team X in the first half of the game
Col B
The number of points scored by team Y in the first half of the game

2)On a turntable, a record of radius 6 inches is rotating at the rate of 45 revolutions per minute.
Col A
The number of inches traveled per minute by a point on the circumference of the record
Col B
The number of inches traveled per minute by a point on the record 5 inches from the center of the record

3)In the history class that consisted of 30 students, the number of seniors was 3 more than twice the number of juniors, and 3/10 of the students were neither juniors nor seniors

Col A
The number of juniors in the class
Col B
6

4)
Col A
The greatest even factor of 180 that is less than 90
Col B
The greatest odd factor of 180

5)
Col A
4x^2 + 4y^2
Col B
(2x + 2y)^2

6)Saplings are to be planted 30 feet apart along one side of a straight lane 455 feet long. If the first sapling is to be planted at one end of the lane, how many saplings are needed?
a)18 b)16 c)15 1/6 d)15 e)14

answers:1)d 2)a 3)c 4)a 5)d 6)b

Econ
10-20-2004, 09:06 PM
(1) D. There is no info about how many points Y scored in the first half.

(2) A. Since the point on the Circumference is 6 inches away it must have traveled more distance. {Somewhere I have seen a question stated exactly the same but the question was to compare the number of rotations that the two points made---->(C)}

(3) Setup the system: S=2J+3, N=(3/10)30=9, S+J=21 ------------> S=15,J=6,N=9,
thus choosing (C).

(4) I think 60>15 --------> (A).

(5) (D) since: (A) = 4x^2 + 4y^2
(B)= 4x^2 + 4y^2 + 8xy
You don't know whether xy>0, xy<0 or xy=0.

(6) Start by placing one sapling at 0 and every 30 add 1 sapling. Disregard the five last feets (saplings must be an integer) and arrive at the answer.

P.S. What is a sapling?

Dingus
10-20-2004, 09:18 PM
Sapling is a small plant, a baby plant, you can say. :)

Econ
10-20-2004, 09:44 PM
That is,
sapling :: plant , caterpillar :: butterfly , tadpole :: frog , cub :: bear, larval :: insect ?
Thanks Dingus!

neokeynesian
10-21-2004, 04:33 AM
Thanks econ.
From the Macmillan dictionary: sapling-- a young tree