Perform the matrix operation.Given A = 
and B = 
, find 3A + 4B.
A. 
B. 
C. 
D. 
Answer: B
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Express as a difference of logarithms.log 
A. log (14 - 17) B. log 14 - log 17 C. log 14 ÷ log 17 D. log 17 - log 14
Solve the problem.A $114,000 trust is to be invested in bonds paying 8%, CDs paying 5%, and mortgages paying 10%. The bond and CD investment must equal the mortgage investment. To earn an $9210 annual income from the investments, how much should the bank invest in bonds?
A. $20,000 B. $35,000 C. $57,000 D. $22,000
Graph the function.y = 
cos 
x
A. 
B. 
C. 
D. 
Solve the problem.DG's Plumbing and Heating charges $50 plus $60 per hour for emergency service. Bill remembers being billed just over $400 for an emergency call. How long to the nearest hour was the plumber at Bill's house?
A. 14 hours B. 10 hours C. 8 hours D. 6 hours