
In the diagram above, the radius of the circle is 20 units and the length of arc AB is 15(Pi) units. What is the
measure in degrees of angle AOB?
正解:
135
Explanation/Reference:
The length of an arc is equal to the circumference of the circle multiplied by the measure of the angle that
intercepts the arc divided by 360. The arc measures 15(Pi) units, the circumference of a circle is 2(Pi)
multiplied by the radius, and the radius of the circle is 20 units. If x represents the measure of angleAOB,
then:

The measure of angle AOB is 135 degrees.
質問 2:
The equation is undefined when

A. 9.
B. 0.
C. 2.
D. 9.
E. 6.
正解:D
解説: (Pass4Test メンバーにのみ表示されます)
質問 3:

In the diagram above of f(x), for how many values does f(x) = -1?
A. 0
B. 4
C. 1
D. 3
E. 2
正解:E
解説: (Pass4Test メンバーにのみ表示されます)
質問 4:
Robert is practicing for the long jump competition. His first four jumps measure 12.4 ft, 18.9 ft, 17.3 ft, and
1 5.3 ft, respectively. If he averages 16.3 feet for his first five jumps, what is the length in feet of his fifth
jump?
正解:
17.6
Explanation/Reference:
If Robert averages16.3feet for five jumps, then he jumps a total of(16.3)(5)= 81.5feet. The sum of Robert's

first four jumps is Therefore, the measure of his fifth

jump is equal to
質問 5:
Monica sells pretzels in the cafeteria every school day for a week. She sells 14 pretzels on Monday, 12
pretzels on Tuesday, 16 pretzels on Wednesday, and 12 pretzels on Thursday. Then, she calculates the
mean, median, and mode of her sales. If she sells 13 pretzels on Friday, then
A. the median will decrease.
B. the mode will increase.
C. the median will stay the same.
D. the mean will stay the same.
E. the mean will increase.
正解:C
解説: (Pass4Test メンバーにのみ表示されます)
質問 6:
If


A. Option E
B. Option C
C. Option A
D. Option D
E. Option B
正解:B
解説: (Pass4Test メンバーにのみ表示されます)
Harukawa -
余裕でSAT-Mathematicsに受かりました!!初学者のわしでも比較的習得しやすいですね。