Solve the problem.The area A = ?r2 of a circular oil spill changes with the radius. At what rate does the area change with respect to the radius when 
A. 8? ft2/ft
B. 16? ft2/ft
C. 8 ft2/ft
D. 4? ft2/ft
Answer: A
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Find the missing length(s) in the right triangle. If necessary, round to the nearest tenth.
A. a = 7 cm; b = 12.1 cm B. a = 12.1 cm; b = 7 cm C. a = 7 cm; b = 147 cm D. a = 12.1 cm; b = 10.5 cm
Solve the problem.The distance d in miles that can be seen on the surface of the ocean is given by 
where h is the height in feet above the surface. How high would a platform have to be to see a distance of 12.5 miles? Round to the nearest tenth when necessary.
A. 203.2 ft B. 96.2 ft C. 156.3 ft D. 92.5 ft
Points A, B and C are on circle O, as shown. If AC = 20° and AOB = 120°, find the following.
(a) BC
(b) ?BAC
(c) The area of the shaded region.
For the given functions f and g, find the requested function and state its domain.f(x) = 3x + 5; g(x) = 2x - 1Find 
.
A. 
(x) = 
; 
or 
B. 
(x) = 
; 
or 
C. 
(x) = 
; 
or 
D. 
(x) = 
; 
or 