Find the coordinates of the vertex and the direction of opening of each parabola.x = -(y - 1)2 - 1
A. (-1, 0) opens right
B. (0, -1) opens right
C. (1, 1) opens left
D. (-1, 1) opens left
Answer: D
Mathematics
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Plot the point whose polar coordinates are given.(-2, 9?/4)
A. 
B. 
C. 
D. 
Mathematics
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 = 0.02 and 
when t = 0. Solve the differential equation of y when f(t) = -18t.
A. y = -900t + 45,000 - 35,000e-0.02t B. y = 900t + 45,000 - 35,000e0.02t C. y = -900t - 45,000 - 35,000e0.02t D. y = 900t + 45,000 - 35,000e-0.02t
Mathematics
Add.
A. 627 B. 426 C. 537 D. 516
Mathematics
Use the properties of logarithms to find the exact value of the expression. Do not use a calculator.ln e
A. e
B. 
C. 4
D. 2
Mathematics