A company installs 5,000 light bulbs. The lifetimes of the lightbulbs are approximately normally distributed with a mean of 500 hours and a standard deviation of 100 hours. Find the approximate number of bulbs that can be expected to last the indicated amount of time.Between 290 hours and 540 hours
A. 1,641
B. 1,639
C. 3,185
D. 3,190
Answer: C
Mathematics
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Write as a decimal.0.93%
A. 0.0103 B. 0.093 C. 0.93 D. 0.0093
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Rewrite the complex number in standard polar form, plot the number in the complex plane, and determine the quadrant in which the point lies or the axis on which the point lies.z = 6
A. z = 6
; Quadrant II
B. z = 6
; Quadrant IV
C. z = 6
; Quadrant III
D. z = 6
; Quadrant IV
Mathematics
Find 
, 
and 
.
?
and 
?
A. 
B. 
C. ?
D. 
Mathematics
Determine if the given number is a solution to the given equation. Answer yes or no.Is 3 a solution to y3 = 9?
A. yes B. no
Mathematics