Multiply and simplify. Assume that all variables represent positive real numbers.(5 - 
)(6 - 
)
A. 30 - 10x
B. 30 - 11
- x
C. 30 - 10
D. 30 - 11
+ x
Answer: D
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State how many peaks you would expect for the distribution described.Weights of the first graders at a school
A. One B. None C. Two D. Three
Determine the value of the indicated function in the given manner.Find cos 60° by using the functions of 30°.
A. 
B. 2
C. 
D. 
Solve the problem.A 9-ft. board is cut into 2 pieces so that one piece is 5 feet longer than 3 times the shorter piece. If the shorter piece is x feet long, find the lengths of both pieces.
A. shorter piece: 15 ft; longer piece: 32 ft. B. shorter piece: 1 ft.; longer piece: 8 ft. C. shorter piece: 4.5 ft; longer piece: 27 ft. D. shorter piece: 22 ft; longer piece: 27 ft.
Two sides of a triangle are m and m in length and the angle between them is increasing at a rate of 0.06 rad/s. Find the rate at which the area of the triangle is increasing when the angle between the sides of fixed length is 
Select the correct answer.
a. 1.145 
b. ?0.955
c. 0.090
d. 5.045
e. ?1.955