Solve the problem.The viewing angle for a camera is given (in degrees) by 
where x is the focal length of the lens. The focal length on most adjustable cameras is marked in millimeters on the lense mount. Find the viewing angle, in degrees, if the focal length is 180 millimeters.
A. 135.0°
B. 17.1°
C. 5.7°
D. 252.9°
Answer: B
Mathematics
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Add or subtract as indicated. Write the answer in simplest form.
- 
A. 2
B. 
C. 
D. 
Mathematics
Find the average value of the function
?
?
over the indicated interval 
.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Simplify the expression. - 5
+ 20
A. - 5
B. 24
C. 16
D. 14
Mathematics
The formula below gives the relationship between the number of sides n, the radius r, and the length of each side l in a regular polygon. Find n, if ?l? = 1?r?.
?
?
?
A. n = 8 B. n = 5 C. n = 7 D. n = 6 E. n = 4
Mathematics