Use the quadratic formula to solve the equation.-2x2 - 3x - 5 = 0
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Evaluate.7 ? (8 - 15)2
A. -49 B. 343 C. -343 D. 49
Mathematics
Solve the problem.Use the formula D = 10.0 log (S/S0), where the loudness of a sound in decibels is determined by S, the number of watt/m2 produced by the soundwave, and S0 = 1.00 × 10-12 watt/m2. A certain noise produces 5.1 × 10-4 watt/m2 of power. What is the decibel level of this noise? (Round to an appropriate number of significant digits.)
A. 200 decibels B. 77 decibels C. 9 decibels D. 87 decibels
Mathematics
Solve the problem.A 5-card hand is dealt from a deck of 52 cards. What is the probability thata) none are queens?b) all are queens?
A. a) 0.65884 b) 0 B. a) 0 b) 0.07487 C. a) 0 b) 0.65884 D. a) 0.07487 b) 0
Mathematics
Sketch a graph of the function.
Mathematics