Find the value of cos A if angle A is acute and sin A = 7/10
(A)3/10
(B)1/9
(C)7/√51
(D)51/10
(E)√51/10
The Correct Answer
Explanation
For which of the following values of c will there be 2 distinct real solutions to the equation 5x2 + 16x + c = 0?
（A）3 （B） 9 （C） 14 （D） 15 （E） 20
Correct Answer: A
In the circle below, O is the center and measures 5 inches from chord 
. The area of the circle is 169π square inches. What is the length of , in inches?
（A）12 （B） 13 （C） 18 （D） 24 （E） 26
Correct Answer: D
In the figure below, 
is a line segment and all distances are given in inches. What is the ratio of the area of quadrilateral RBCS to the area of quadrilateral SCFT?
（A）9:7 （B） 7:9 （C） 11:13 （D） 11:39 （E） 11:50
Correct Answer: D
More ACT Math Exam Questions
- 1In the figure below,
is a diameter of the circle and m ∠BAC = 35°. Find the measure of arc 
.
- 2Five cans of tomatoes cost $6.50. At this rate, how much will nine cans of tomatoes cost?
- 3For all xy ≠ 0, and when both x and y are greater than 1, the expression
equals which of the following? - 4Which of the following is NOT the graph of a function
- 5In the figure below, a cone is shown, with dimensions given in
centimeters. What is the total surface area of this cone, in square
centimeters? (Note: The total surface area of a cone is given by the
expression πr2 + πrs, where r is the radius and s is the slant height.)
