Use a half-angle formula to find the exact value of the expression.cos 
A. 
B. - 
C. - 
D. 
Answer: D
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Write as ordinary numbers.8.06 × 104
A. 322.4 B. 806,000 C. 8,060 D. 80,600
Evaluate the given binomial coefficient.
A. 504 B. 126 C. 30,240 D. 252
Solve the problem.Mike's Bait Shop sells three types of lures (discount, normal, and professional) at its three locations. The table below shows the number of lures of each type sold per day at each location. 
The income per lure for discount, normal, and professional lures is $5, $9, and $12, respectively. Create two matrices to represent these data, and use matrix multiplication to find a matrix that gives the daily income at each location.
A. 
B. 
C. 
D. 
A formula is given along with the values of all but one of the variables in the formula. Find the value of the variable not given.V = 
?r3; r = 4, ? = 3.14
A. 66.99 B. 803.85 C. 267.95 D. 85.33