SAT Practice Test 4, Section 4: Questions 16  18
The following are worked solutions for the questions in the math sections of the SAT Practice Tests found in the Official SAT Study Guide.
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16. Correct answer: 5/11
Given:
The table

VotingAge Population 
Number of Registered Voters 
Men 
1,200 
1,000 
Women 
1,300 
1,200 
40% of the votingage population actually voted
To find:
Turnout for the election =
Solution:
40% of the votingage population actually voted =
40% × (1,200 + 1,300) = 0.4 × 2,500 = 1000
From the table, number of registered voters = 1,000 + 1,200 = 2,200
Answer:
17. Correct answer: 8
Given:
A 3dimensional figure with two parallel bases and 18 edges
Line segments are drawn from vertex V to each of the other 11 vertices
To find:
The number of line segments that will not lie on the edge of the figure.
Solution:
First, consider the upper base which contains the vertex V.
We can draw 3 line segments from V to the other vertices (not including those that lie on the edge of the figure).
Next, we consider the number of line segments from V to the 6 vertices of the lower base. One of the line segments lie on the edge of the figure. So there are 5 line segments from V that do not lie on the edge of the figure.
The total number of line segments is 3 + 5 = 8
Answer: 8
18. Correct answer: 16
Given:
ABCD is a rectangle
Points A and C lie on the graph of y = px 3
Area of ABCD is 4
To find:
The value of p
Solution:
Topic(s): Coordinate geometry
Answer: 16
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