Clear fractions and solve.
+ 
= 0
A. 
B. 6, -1
C. 3
D. - 
, 1
Answer: A
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Perform the indicated operation.A factor used in measuring the loudness sensed by the human ear is 
0.3, where I is the intensity of the sound and I0 is a reference intensity. Evaluate this factor for I = 3.3 × 10-6 W/m2 and I0 = 1.0 × 10-12 W/m2 to two significant digits.
A. 0.011 B. 0.023 C. 44 D. 90
Simplify the expression. Assume that all variables are positive when they appear.
- 
A. 2 - 3
B. 5
C. 3
- 2
D. 2
- 3
A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last the specified period of time.Between 290 hours and 540 hours
A. 3190 B. 1641 C. 1639 D. 3188
Perform the indicated operations and express your answer in the form a + bi. 
A. ±3
B. 3i
C. -i
D. -3i