Add. Do not use a number line except as a check.- 
+ 
A. 
B. - 
C. - 
D. 
Answer: D
Mathematics
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Solve the problem.An object of mass m is dropped from a helicopter. Assuming that air resistance is proportional to velocity, the velocity v of the object satisfies the equation 
Find velocity as a function of time.
A. v = 
(1 - e-kt/m)
B. v = 
- e-kt/m
C. v = 
(1 - ekt/m)
D. v = 
(1 - e-kt/m)
Mathematics
Round the number as indicated.645 to the nearest thousand
A. 10,000 B. 1000 C. 100,000 D. 100
Mathematics
Perform the operation indicated. Simplify.
+ 
A. 
B. 
C. 
D. 
Mathematics
Solve the inequality. Express the solution using interval notation.
|4x+2|?2
Mathematics