Compared to the graph of y = sin x, the graph of y = 2 sin(4x) has:
(A)8 times the amplitude and the same period.
(B) 2 times the amplitude and 4 times the period.
(C) 2 times the amplitude and 
the period.
(D) 
the amplitude and 4 times the period.
(E) the amplitude and the period.
In the following figure, O is the center of the circle, 
is tangent to the circle at D,and 
is tangent to the circle at E.Which of the following must be true?
(F) 
(G) 
is isosceles(H) 
(J) 
(K) 
is a square
Correct Answer: K
In the following figure, if the dimensions of the trapezoid are as shown and the area of the trapezoid is 144, what is the value of x?
(F) 2(G) 3(H) 4(J) 6(K) 8
Correct Answer: F
What is the formula of a line that is perpendicular to 
and includes the point (3, 4)?
(A) 
(B) 
(C) y= 3x+ 5(D) y= –3x+ 5(E) y= –3x+ 13
Correct Answer: E
More ACT Math Exam Questions
- 1
A trapezoidal driveway has the dimensions, in yards, given in the figure below. What is the area, in square yards, of the driveway?
- 2
Whenever x and y are both integers, what is (6.0 × 10x)(5.0y × 10y)expressed in scientific notation?
- 3Which of the following could be a value of x if 11 < x < 12?
- 4
In the following figure, each circle is tangent to the other two circles, and the two shaded circles are identical to each other. What is the ratio of the shaded region to the nonshaded region?
- 5
If
