Solve.The shadow cast by an object on a sunny day is directly proportional to the height of the object. If a person 84 inches tall casts a shadow 67 inches long, how tall is a tree which casts a shadow 48 feet in length?
A. 38.29 feet
B. 117.25 feet
C. 75.5 feet
D. 60.18 feet
Answer: D
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Solve the problem.Find the number of different three-member committees that could be selected from the group of {Mary, Norman, Paula, Raymond, Sally} given that Sally must be on the committee.
A. 3 B. 6 C. 5 D. 4
Find the transverse axis, vertices, and foci of the hyperbola.
- 
= 1
A. transverse axis is x-axis
vertices at (-10, 0) and (10, 0)
foci at (- 2
, 0) and (2
, 0)
B. transverse axis is x-axis
vertices at (-8, 0) and (8, 0)
foci at (-10, 0) and (10, 0)
C. transverse axis is y-axis
vertices at (0, -8) and (0, 8)
foci at (0, - 2
) and (0, 2
)
D. transverse axis is x-axis
vertices at (-8, 0) and (8, 0)
foci at (- 2
, 0) and (2
, 0)
Use the properties of logarithms to evaluate the expression.10log t
A. 10t B. t C. 10t D. 1
Find the domain of the rational expression. 
A. {x|x is a real number and x ? -7 and x ? 7} B. {x|x is a real number and x ? -7 and x ? 7 and x ? -8} C. {x|x is a real number and x ? -8 and x ? 7} D. {x|x is a real number}