Find the indicated sum. Find the sum of the first 7 terms in the geometric series 3 + 9 + 27 + . . .
A. 3279
B. 1092
C. 9840
D. 1122
Answer: A
Mathematics
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Use the decibel scale to answer the question.What is the loudness, in decibels, of a sound 53 million times as loud as the softest audible sound?
A. 62 dB B. 93 dB C. 77 dB D. 108 dB
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Use the product-to-sum or sum-to-product identities to find an identity for the given expression.sin 13? - sin 7?
A. 2 cos 10? sin 3?
B. cos 10? sin 3?
C. -2 cos 10? cos 3?
D. -2 cos 5? sin 
?
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Graph the system of inequalities.y ? -x2 - 6x - 4y ? x2 + 6x + 4
A. 
B. 
C. 
D. 
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Solve.A certain drug comes in 1500-mg pills. How many of these pills do you have to take to get a dosage of half a gram?
A. 4 pills
B. 
pill
C. 
pill
D. 3 pills
Mathematics