Determine whether the two lines are parallel, perpendicular, or neither parallel nor perpendicular. 4x - 3y = -11 4x + 3y = -9
A. Parallel
B. Perpendicular
C. Neither
Answer: C
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Solve the problem.What is the intensity in Watts/m2 of a noise measured at 57 decibels? The level of sound intensity in decibels (dB) is 
where ? (beta) is the number of decibels, I is the sound intensity in W/m2, and I0= 
(Round to the nearest hundredth.)
A. 5.70 × 10-10 W/m2 B. 5.01 × 10-6 W/m2 C. 2.99 × 1014 W/m2 D. 5.01 × 10-7 W/m2
Find the inverse of A if it has one, or state that the inverse does not exist.A = 
A. 
B. 
C. Inverse does not exist
D. 
Use a graphing utility to find the sum of the geometric sequence. Round answer to two decimal places, if necessary.5 + 10 + 20 + 40 + 80 + ... + 5 ? 213
A. 81,917 B. 81,915 C. 81,895 D. 81,952
Solve the problem.The average daily temperature T of a city in the United States is approximated by T = 55 - 23 cos 
(t -30)where t is in days, 1 ? t ? 365, and t = 1 corresponds to January 1. Find the period of T.
Fill in the blank(s) with the appropriate word(s).