For the given functions f and g, find the requested function and state its domain.f(x) = 16 - x2; g(x) = 4 - xFind f + g.
A. (f + g)(x) = -x2 + x + 12; all real numbers
B. (f + g)(x) = x3 - 4x2 - 16x + 64; all real numbers
C. (f + g)(x) = -x2 - x + 20; all real numbers
D. (f + g)(x) = 4 + x; {x|x ? -4}
Answer: C
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Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with intercepts (±5, 0) and (0, ±6)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the problem.A certain company has found that its expenditure rate per day (in hundreds of dollars) on a certain type of job is given by 
where x is the number of days since the start of the job. Find the expenditure if the job takes 4 days.
A. $3200 B. $80 C. $8000 D. $32
Simplify.
÷ 
÷ 
A. 
B. 
C. 
D. 
Perform the operation. Write the answer as a fraction in lowest terms.2 ? 1
A. 
B. 
C. 
D. 