Find the present value. Round to the nearest cent.To get $2000 after 7 years at 4% compounded semiannually
A. $1515.75
B. $1519.84
C. $1546.07
D. $484.25
Answer: A
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Determine whether the study is an experiment or an observational study.A medical researcher obtains a sample of adults suffering from diabetes. She randomly assigns 75 people to a treatment group and 75 to a placebo group. The treatment group receives a medication over a period of three months and the placebo group receives a placebo over the same time frame. At the end of three months the patients' symptoms are evaluated.
A. experiment B. observational study
Perform the indicated operation.0.80 + (-3.039)
A. 2.239 B. -3.839 C. -2.239 D. -3.739
Find the vertices and foci of the given ellipse.4x2 + 16y2 = 64
A. Vertices: (16, 0)and (-16, 0);
Foci: (4, 0) and (-4, 0)
B. Vertices: (4, 0)and (-4, 0);
Foci: (2
, 0)and (-2
, 0)
C. Vertices: (0, 4) and (0, -4);
Foci: (0, 2
) and (0, -2
)
D. Vertices: (0, 4) and (0, -4);
Foci: (0, 2) and (0, -2)
Determine if the function is a solution to the given differential equation.y = x ln x - 4x + 5; y'' - 
= 0.
A. No B. Yes