Simplify.
A. 
B. 
C. 
D. 
Answer: C
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Find the requested function value of ?.If csc ? = 
, find cot ?.
A. 
B. 
C. 
D. 
Assume you have a digraph with 5 vertices (A, B, C, D, and E) and 9 arcs. B is incident from D, E, and A; C is incident to E and A and incident from D; E is incident to D and incident from A.Vertex B has
A. indegree 1, outdegree 2. B. indegree 2, outdegree 1. C. indegree 3, outdegree 0. D. indegree 0, outdegree 3. E. none of these
Solve the problem.A certain radioactive isotope decays at a rate of 0.175% annually. Determine the half-life of this isotope, to the nearest year.
A. 396 yr B. 172 yr C. 4 yr D. 286 yr
Solve the problem.The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew (in millimeters). By using linear regression, the following function is obtained: 
where x is temperature and y is growth in millimeters. Use this function to predict the growth of a plant if the temperature is 60. Round to the nearest hundredth.
A. 26.00 B. 28.22 C. 27.74 D. 27.26