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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Solve the equation.
x = 72
A. 
B. 
C. {81}
D. 
Mathematics
Solve the problem.Sue wants to add a decorative wallpaper border to her living room. Refer to the diagram below for the dimensions of Sue's living room. How many feet of wallpaper border will she need?
A. 60 ft B. 66 ft C. 54 ft D. 63 ft
Mathematics
Solve the problem.Find the missing length in the similar triangles.
A. x = 12 B. x = 9 C. x = 3 D. x = 6
Mathematics
Add or subtract. Then simplify by collecting like radical terms, if possible.-20
- 13
A. -7
B. 8
C. 32
D. -33
Mathematics