Solve the problem.The equation V = -3000t + 21,000 describes the value in dollars of a certain model of car after it is t years old. If a car is worth $12,000, find the age of the car.
A. 2 yr
B. 5 yr
C. 3 yr
D. 4 yr
Answer: C
Mathematics
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Find the polar coordinates, 
and 
, of the point given in Cartesian coordinates.(
, -
)
A. 
B. (
C. 
D. 
Mathematics
Multiply.
A. 69,590 B. 80,590 C. 70,590 D. 71,590
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Suppose that ln 2 = a and ln 5 = b. Use properties of logarithms to write each logarithm in terms of a and b.ln 10
A. ab B. ln a + ln b C. a - b D. a + b
Mathematics
Find the domain of the function.f(x) = 
A. 
, or (-?, -7) ? 
? 
B. 
, or 
? 
C. {x| x ? 7}, or (-?, 7) ? (7, ?)
D. 
, or 
? 
? (7, ?)
Mathematics