7
A. 
B. 
C. 
D. 
Answer: D
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Find the infinite sum accurate to three decimal places.
A. -0.320 B. -0.859 C. 0.460 D. 0.859
Find the exact value of the expression.
A. - 
B. - 
C. -2
D. -
Determine all solutions of the equation in radians.Find sin 
, given that sin ? = - 
and ? terminates in 270° < ? < 360°.
A. 
B. - 
C. - 
D. 
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. Find a quadratic equation for f in vertex form. Use the data for the year 2013 to find the vertex and use the data for the year 2017 to find the value of a.
A. f(t) = 0.71(t - 4)2 + 39.3 B. f(t) = 0.4(t - 3)2 + 39.3 C. f(t) = 6.4(t - 3)2 + 39.3 D. f(t) = -0.23(t - 3)2 + 49.4