Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20
B. 100
C. 10
D. 500
Answer: C
Mathematics
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Evaluate the function.Find f(2) when f(x) = x2 + 2x - 7.
A. 7 B. 15 C. 1 D. -7
Mathematics
Solve the problem.Find the distance between the line 
and the parabola 
Use the fact that the line connecting the closest points on each curve is normal to both curves.
A. 
B. 
C. 
D. 
Mathematics
Add or subtract as indicated. Simplify if necessary. - 
- 
A. - 
B. - 
C. - 
D. 
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Solve the problem. Round your answer to the nearest tenth, if necessary.A jet plane traveling at a constant speed goes 1200 mi with the wind, then turns around and travels for 1000 mi against the wind. If the speed of the wind is a constant 50 mph, and the total flight took 4 hours, find the speed of the plane.
A. 525 mph B. 550 mph C. 605 mph D. 435 mph
Mathematics