Use the definition or identities to find the exact value of the indicated trigonometric function of the acute angle ?.cot ? = 
Find sin ?.
A. 
B. 3
C. 
D. 
Answer: C
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Solve the problem.At a local grocery store the demand for ground beef is approximately 50 pounds per week when the price per pound is $4, but is only 40 pounds per week when the price rises to $5.50 per pound. Assuming a linear relationship between the demand x and the price per pound p, express the price as a function of demand. Use this model to predict the demand if the price rises to $5.80 per pound.
A. p = 0.15x + 11.5; 38 pounds B. p = 11.5x + -0.15; 40 pounds C. p = - 0.15x + 11.5; 38 pounds D. p = - 0.15x - 11.5; 40 pounds
Graph the function.f(x) = 
A. 
B. 
C. 
D. 
Use Euler circles to check the validity of the argument. ? No politicians are honest. Some dishonest people are found out. Therefore, some politicians are found out. ? The argument is __________. ?
A. not valid B. valid
Solve the problem.A bridge is built in the shape of a semielliptical arch. It has a span of 90 feet. The height of the arch 28 feet from the center is to be 7 feet. Find the height of the arch at its center.
A. 28.35 ft B. 7.37 ft C. 11.25 ft D. 8.94 ft