Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold in order for P = 0 (the break- even point).
A. t = -18 or t = -10
B. t = 28
C. t = 18 or t = 10
D. t > 18
Answer: C
Mathematics
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Translate the English sentence into a mathematical sentence and solve, if necessary. Use x as the variable.The height of a member of the basketball team is at least 81 inches.
A. x > 81 B. x < 81 C. x ? 81 D. x ? 81
Mathematics
Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 
Mathematics
Use the graph to determine the domain and range of the function. 
A. domain: {x|x ? -5} range: {y|y ? 0} B. domain: {x|x > 0} range: {y|y ? -5} C. domain: {x|x ? 0} range: {y|y ? -5} D. domain: {x|x ? -5} range: {y|y > 0}
Mathematics
Write the system of equations associated with the augmented matrix. Do not solve.
A. 
B. 
C. 
D. 
Mathematics