12.Practice.Tests.for.the.SAT_2015-2016_1128p

12 Practice Tests for the SAT /
Practice Test Five Answers an d Explanations 489
14. c
Difficulty: High
Strategic Advice: To find the measure of an arc of a circle,
divide the circumference of the circle by the fraction of the
circle the arc covers.
Getting to the Answer:
The area of the circle is w2 = 1 67t, so the radius = 4; the
diameter = 8.
Circumference of the circle: dn = 8n
Measure of the arc: s; = n
Perimeter of the region: 2r + measure of the arc
Perimeter of the region: 8 + 7t
15. A
Difficulty: High
Strategic Advice: Sometimes you may have to think about
problems in a different way than how they're presented.
In this problem, imagine that the equations given are
equations of lines on a coordinate plane. Two equations
have no common solutions when their lines are parallel;
therefore, put these two equations into slope-intercept form
and make the slopes equal.
Getting to the Answer:
3x -4y= 10
-4y=-3x + lO
y= .2. x- 2
4 2
6X +l!V}'= l6
y= -6 x+ 1.§.
w w
3 - -6
4--w
3w =-24
W =-8
16. E
Difficulty: High
Strategic Advice: To determine if the some of the
conditions are true or false, you need to calculate how
many total shots were taken and how many total shots
were made.
Getting to the Answer:
I. True, because, 25 out of 30 people hit the
target on their first try. Eliminate (B) and (D).
II. True. You can calculate the total number of
made shots:
5 people made 0 shots 0
6 people made 1 shot 6
7 people made 2 shots 7 x 2 = l 4
8 people made 3 shots 8 x 3 = 24
4 people made 4 shots 4 x 4 = 1 6
Adding these shows that 60 shots were made. Since each
person can only miss once, there must have been exactly
30 misses.
Ill. True, the most times a contestant hit the target
in a row was 4.
SECTION 8
1. B
Difficulty: Low
How might winning the championship make the coach's
leadership skills appear? If at first people questioned,
or doubted, the coach's leadership, then winning the
championship would most likely make people realize he
was quite skilled or capable of managing his team. Look for
a word that means skilled.
In (A), the coach's leadership would not appear remiss
because he won the championship. Choice (B) is a perfect
fit for your prediction. In (C), nothing in the sentence
explores whether or not the coach was humorous. In (D),
the fact that the coach won his first championship would
not necessarily reveal he was hesitant about leading his
team. In (E), if the coach had just won the championship,
then he would most likely not be contemptuous, or
disapproving, of running his team.