Determine the indefinite integral. Check your work by differentiation.
d?
A. cot ? + C
B. -cot ? + C
C. ? + tan ? + C
D. cos2 ? + C
Answer: B
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Solve the problem.dy/dt = ky + f(t) is a population model where y is the population at time t and f(t) is some function to describe the net effect on the population. Assume k = .02 and 
when t = 0. Solve the differential equation of y when f(t) = -19t.
A. y = 950t + 47,500 - 37,500e.02t B. y = -950t - 47,500 - 37,500e.02t C. y = 950t + 47,500 - 37,500e-.02t D. y = -950t + 47,500 - 37,500e-.02t
Write the complex number in polar form.-2
A. 2(cos 270° + j sin 270°) B. 2(cos 180° + j sin 180°) C. 2(cos 0° + j sin 0°) D. 2(cos 90° + j sin 90°)
Provide an appropriate response. In the relationship of 11.25 is 25% of 45, what is the word associated with 25%?
A. portion B. rate C. discount D. base
Add.73.86 + 3.413 + 7.074 + 4.32
A. 88.667 B. 88.677 C. 89.667 D. 88.767