Solve the problem.A company installs 5000 light bulbs. Each bulb has an average life of 500 hours with a standard deviation of 100 hours. The life of each bulb is approximated by a normal curve. Find the number of bulbs that can be expected to last less than 500 hours.
A. 2400
B. 3000
C. 2500
D. 1000
Answer: C
You might also like to view...
Solve the problem.If a graph has 5 vertices and M is the number of vertices of odd degree, then M cannot be
A. 2. B. 4. C. 0. D. 3. E. none of these
Evaluate the integral.
dx
A. 4 sin 2x - 
sin3 2x + C
B. 8 sin 2x - 
sin3 2x + C
C. 4 sin 2x - 
cos3 2x + C
D. 4 sin 2x + 
sin3 2x + C
Simplify.
? 
+ 
? 
A. 
B. 
C. 
D. 
Find the intercepts of the circle. Round to the nearest hundredth, when necessary.(x + 3)2 + (y - 1)2 = 28
A. The two x-intercepts are x ? 2.39 and x ? -8.39, and the two y-intercepts are y ? 7.08 and y ? -5.08. B. The two x-intercepts are x ? 8.2 and x ? -2.2, and the two y-intercepts are y ? 3.36 and y ? -5.36. C. There are no intercepts. D. The two x-intercepts are x ? 2.2 and x ? -8.2, and the two y-intercepts are y ? 5.36 and y ? -3.36.