Solve the problem.Use the formula ? = 10 log(I/I0), where the loudness of a sound in decibels is determined by I, the number of Watts/m2 produced by the sound wave, and 
A certain noise measures 44 decibels. If the intensity is multiplied by 100, how many decibels will the new noise measure? (Round to the nearest unit.)
A. 64 decibels
B. 46 decibels
C. 4400 decibels
D. 88 decibels
Answer: A
Mathematics
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Multiply.(3x - 9y2)2
A. 9x2 - 81y4 B. 9x2 + 81y4 C. 9x2 + 54xy2 + 81y4 D. 9x2 - 54xy2 + 81y4
Mathematics
Find the values of the variables.
= 
A. m = 11, n = -9, x = 3 B. m = -11, n = 9, x = -3 C. m = 7, n = -5, x = 3 D. m = -9, n = 11, x = 0
Mathematics
Factor the polynomial completely. If the polynomial cannot be factored, say it is prime.a2 - 4ab - 32b2
A. (a - 4b)(a - 8b) B. (a + 4b)(a - 8b) C. (a - 4b)(a + b) D. Prime
Mathematics
Solve the problem.Pennies are packaged 50 in a roll. A mother broke open some rolls of pennies. She gave her son 
and she had 21 pennies left over. How many rolls of pennies did she break open?
A. 7 rolls B. 6 rolls C. 4 rolls D. 5 rolls
Mathematics