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 period of time.Less than 500 hours
A. 1000 bulbs
B. 3000 bulbs
C. 2500 bulbs
D. 2400 bulbs
Answer: C
Mathematics
You might also like to view...
Multiply the rational expressions.
? 
A. 
B. 1
C. - 
D. 
Mathematics
Solve the problem.Where does the graph of the function f(x) = 3x3 - 5x2 - 15x + 25cross the x-axis?
A. 1.67, 
B. 1.67
C. 
, -
D. 1.67, 
, -
Mathematics
Write the logarithmic equation in exponential form.ln e8 = 8
A. ln 8 = 8 B. ln e8 = e8 C. e8 = 8 D. e8 = e8
Mathematics
Solve the problem.Stefanie bought a couch originally priced at $1000, a refrigerator originally priced at $800, and a $400 DVD player. What was her total bill? Round your answer to the nearest hundredth.
A. $1566.00 B. $3164.40 C. $1470.00 D. $1587.60
Mathematics