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)
Answer: A
Mathematics
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Solve the equation 
. Restrict your attention to the horizontal span of 0 to 10. Round your answer to two decimal places if necessary.
?
A. 2.41 B. 5.01 C. 6.74 D. 1.05
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Factor, if possible.x3 + 6x2 - 55x
A. x(x + 11)(x - 5) B. (x2 + 5)(x - 11) C. (x2 + 11)(x - 5) D. x(x - 11)(x + 5)
Mathematics
Solve. 12r2 = 3r
A. 
B. 0, 
C. 0, 4
D. 0
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Graph the function and give its domain and its range.f(x) = 
A. [0, ?); [3, ?)
B. [3, ?); [0, ?)
C. [0, ?); [-3, ?)
D. [-3, ?); [0, ?)
Mathematics