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 500 hours
A. 2913
B. 2410
C. 2413
D. 2911
Answer: B
Mathematics
You might also like to view...
Solve the given trigonometric equation analytically (using identities when necessary for exact values when possible) for values of x for 0 ? x < 2?.sec2 x - 2 = tan2 x
A. 
B. 
C. No solution
D. 
Mathematics
Write the number in standard notation.9.139 × 10-6
A. 0.000009139 B. 0.0000009139 C. 0.00009139 D. -9,139,000
Mathematics
Find the indicated term of the arithmetic sequence.5.9, 5.6, 5.3, . . . ; a9
A. 3.51 B. 3.2 C. 3.5 D. 3.8
Mathematics
Find the equation of the line through the given pair of points in standard form using only integers.(5, -4) and (-2, 3)
A. 7x + 7y = 7 B. 7x - 7y = 7 C. 7x + 7y = 17 D. 7x + 7y = -7
Mathematics