## What is the domain of the function f (x) =

(A) {x | x ≠ 0}

(B) Ø

(C) all real numbers

(D) {x | x ≠ 3}

(E) {x | x ≠ 4 and x ≠ 1}

Rebecca is trying to schedule volunteers to help at a school carnival. There are 5 one-hour shifts to be filled by 5 different volunteers. If each shift must have one and only one volunteer, how many different arrangements can the schedule have?

（A）5 （B） 20 （C） 25 （D） 50 （E） 120

**Correct Answer: E**

The expression is equivalent to:

（A）5y^{4}
（B） 5y^{6}
（C） 5y^{8}
（D） 16y^{4}
（E） 16y^{6}

**Correct Answer: B**

The geometric mean of 3 positive numbers is the cube root of the product of the 3 numbers. What is the geometric mean of 2, 4, and 27?

(A) 6 (B) 11 (C) 21 (D) 72 (E) 216

**Correct Answer: A**

### More ACT Math Exam Questions

- 1
What is the formula of a line that is perpendicular to and includes the point (3, 4)?

- 2In parallelogram ABCD shown below, AB is 7 inches long. If the parallelogram's perimeter is 46 inches, how many inches long is AD?
- 3Marcia's rectangular horse corral is 50 feet wide by 125 feet long. Marcia wants to increase the area by 1,850 square feet by increasing the width and length by the same amount. What will be the new dimensions (width by length), in feet?
- 4
Which of the following points on the

*xy-*graph is the x-intercept of the equation*y*= 2*x*– 8? - 5After Jean spent 90% of her vacation money, $100 remained. How much vacation money did she originally have?