Solve the formula for the specified variable.A = 3?a2 for a
A. a = 
B. a = 
C. a = 
D. a = 
Answer: C
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Name the following angle using three kinds of notation, if possible.
A. ?BCA, ?B B. ?BAC, ?B C. ?ABC, ?B D. ACB, ?B
Find the center and radius of the sphere.x2 + (y + 4)2 + (z - 8)2 = 25
A. C(0, -4, 8), a = 25 B. C(0, 4, -8), a = 5 C. C(0, 4, -8), a = 25 D. C(0, -4, 8), a = 5
Determine i) the domain of the function, ii) the range of the function, iii) the domain of the inverse, and iv) the range of the inverse.f(x) = 
A. f(x): D is all real numbers, R = 
;
f-1(x): D = 
, R is all real numbers
B. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
C. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
D. f(x): D is all real numbers, R is all real numbers;
f-1(x): D is all real numbers, R is all real numbers
Solve the problem. Round to two decimal places if needed.Find the length of the arc intercepted by a central angle of ? = 30° in a circle of radius r = 4 feet.
A. 6.28 feet B. 2.09 feet C. 4.19 feet D. 376.99 feet