Solve the problem.Use the formula ? = 10 log(I/Io), where the loudness of a sound in decibels is determined by I, the number of Watts/m2 produced by the sound wave, and 
What is the intensity in Watts/m2 of a noise measured at 48 decibels? (Round to the nearest tenth.)
A. 6.3 × 10-7 W/m2
B. 1.2 × 1014 W/m2
C. 4.8 × 10-10 W/m2
D. 6.3 × 10-8 W/m2
Answer: D
Mathematics
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Solve the problem.A cashier has a total of 124 bills, made up of fives and tens. The total value of the money is $920. How many ten-dollar bills does the cashier have?
A. 90 ten-dollar bills B. 60 ten-dollar bills C. 30 ten-dollar bills D. 64 ten-dollar bills
Mathematics
Solve the equation.
= 0
A. 3, -3 B. 3 C. -3 D. No Solution
Mathematics
Find the quotient of the fractions. Leave the answer reduced to lowest terms.
÷ 
A. 
B. - 
C. - 
D. - 
Mathematics
Solve the problem.The voltage E in an electrical circuit is given by E = 5.7 cos 110?t, where t is time measured in seconds. Find the amplitude.
A. 5.7 B. 110? C. 11.4 D. 110
Mathematics