Find the domain of the rational function.f(x) = 
A. {x|x ? 3}
B. {x|x ? 0}
C. {x|x ? -3}
D. all real numbers
Answer: A
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Find the unknown value.63 is 70% of what number?
A. 9 B. 900 C. 44.1 D. 90
Find an equation for the ellipse described.Center at (0, 0); focus at (0, 5); vertex at (0, 7)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the problem.The logistic growth function f(t) = 
models the number of people who have become ill with a particular infection t weeks after its initial outbreak in a particular community. How many people became ill with this infection when the epidemic began?
A. 1,860 people B. 93,000 people C. 50 people D. 1,859 people
Solve the problem.The area of a triangle with vertices (x1, y1), (x2, y2), and (x3, y3) is given by Area = ± 
, where the symbol ± indicates that the appropriate sign should be chosen to yield a positive area. Use this formula to find the area of a triangle whose vertices are (9, 5), (7, -6), and (-8, -3).
A. 
square units
B. 
square units
C. 5 square units
D. 171 square units