Determine whether the given point (x,y) is on the unit circle.
A. Yes
B. No
Answer: A
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Solve the problem.The table shows the number of new cases (in thousands) of a certain disease diagnosed in a country in various years. 
Let f(t) be the number of new cases (in thousands) of the disease diagnosed at t years since 2010. Use a quadratic model to predict when the number of new cases of the disease diagnosed will be 53,700. (First find a quadratic equation for f in vertex form by using the data for the years 2013 and 2017).
A. 2021 B. 2019 C. 2020 D. 2022
Multiply. 
A. 4510.52 B. 45.1052 C. 451.052 D. 4.51052
Graph the function.y = sin 
x 
A. 
B. 
C. 
D. 
Find the equation of a circle satisfying the given conditions.Center: (8, 0); radius: 
A. (x - 8)2 + y2 = 14 B. x2 + (y + 8)2 = 196 C. (x + 8)2 + y2 = 14 D. x2 + (y - 8)2 = 196