Solve.In how many different ways can 7 people line up for play tickets?
A. 7
B. 5040
C. 1
D. 823,543
Answer: B
Mathematics
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Solve.Lew is installing an invisible fence in his back yard which measures 109 feet by 68 feet by 89 feet by 99 feet. How many feet of wiring is needed to enclose his yard?
A. 375 ft B. 385 ft C. 355 ft D. 365 ft
Mathematics
Solve the problem.Find the volume of the solid generated by revolving the region in the first quadrant bounded by the x-axis and the curve y = x cos x, 0 ? x ? ?/2 about the y-axis.
A. 
- 8?
B. 
- 4?
C. 
+ 2?2 - 4?
D. 
- 4?
Mathematics
Write the complex number in polar form. Express the argument ? in degrees, with 0 ? ? ? 360°.-
- i
A. 
(cos 225° + i sin 225°)
B. 
(cos 45° + i sin 45°)
C. 
(cos 135° + i sin 135°)
D. 
(cos 315° + i sin 315°)
Mathematics
Find the exact value of the expression.cos 
sin 
- cos 
sin 
A. 
B. 
C. 
D. 1
Mathematics