If y = 0.25(100 - y), then what is the value of y?

(F) 200

(G) 75

(H) 25

(J) 20

(K) 18

What is the length of , in coordinate units?

（A）4 （B） 8 （C） 16 （D） （E）

Quadrilateral FGHJ is shown below in the standard (x,y) coordinate plane. For this quadrilateral, = 10, = 6, = , and = 12.

**Correct Answer: E**

For all t > 0, f(t) = . Which of the following is true about f(t) ?

(A) It increases in proportion to t.
(B) It increases in proportion to t^{2}.
(C) It decreases in proportion to t.
(D) It decreases in proportion to t^{2}.
(E) It remains constant.

**Correct Answer: E**

trapezoid is found by multiplying the height byIf a square has an area of 64 square units, what is the area of the largest circle that can be inscribed inside the square?

F. 4π (G) 8π (H) 16π (J) 64 (K) 64π

**Correct Answer: H**

### More ACT Math Exam Questions

- 1
The amplitude of the trigonometric function shown below is defined as the average of the absolute values of the maximum value of

*f*(*x*) and the minimum value of*f*(*x*). The trigonometric function graphed below can be described by the equation*f*(*x*) =*a*sin(*bx*+*c*), where*a*,*b*, and*c*are real numbers. Which of the following values describes the amplitude of this function? - 2The function y varies directly as x for all real numbers in the (x, y) coordinate plane. Which of the following could be the graph of y?
- 3
Salvador is trying to scale his rectangular self-portrait down to postcard size. The painting is 9 feet wide by 16 feet long. He is using a scale of inch = 1 foot for the postcard-sized self-portrait. What will be the dimensions, in inches, of Salvador's postcard-sized self-portrait?

- 4
What is the area of the shaded region in the following figure?

- 5
When x = 3 and y = 5, by how much does the value of 3x

^{2}– 2y exceed the value of 2x^{2}– 3y ?