Matt needs 
gallons of hydrochloric acid for an experiment. He has 
gallons already. How many more gallons of hydrochloric acid does Matt need?
(A) 
(B) 
(C) 
(D) 
(E) 
Emilia is going to bake cookies. She rolls out a square of dough that is 12 inches wide by 12 inches long and cuts 9 identical circular cookies from the dough, as shown in the figure below. Each circular cut-out is tangent to the circular cut-outs next to it and tangent to the edge or edges of the square piece of dough it touches. Approximately, what is the area, in square inches, of the remaining dough, as shown in the figure?
（A）30.9 （B） 42.3 （C） 50.24 （D） 87.5 （E） 113.04
Correct Answer: A
If x and y are integers such that y > 12 and 2x + y = 19, which of the following is the solution set for x?
（A）x ≥ 4 （B） x ≥ 3 （C） x ≤ 4 （D） x ≤ 3 （E） x ≤ 0
Correct Answer: D
RST is a right triangle with side lengths of r, s, and t, as shown below. What is the value of cos2 S + cos2 R?
(F) 1
(G) 
(H) 
(J) 
(K) 
Correct Answer: F
More ACT Math Exam Questions
- 1
If
, then n! =? - 2If [-S + h(T o 3 - w)]R = 1, then which of the following variables CANNOT equal 0?
- 3
In the grid shown below, each small square has a side length of 1 unit. In the shaded region, each vertex lies on a vertex of a small square. What is the area, in square units, of the shaded region?
- 4
The table below details a recent census report about the commuting habits of U.S. workers age 16 or over for the years 2004, 2005, and 2006.
The circle graph (pie chart) below represents the 2006 means of transportation for U.S. workers age 16 or over for the 4 transportation types listed. To the nearest degree, what is the measure of the central angle for the "Public" sector?
- 5
In the following triangle, what is the value of sec n?
A.
B.
C.
D.
E.