Find an equation for the graph.
A. y = 5 cos (3?x)
B. y = 4 cos 
C. y = 3 cos (5?x)
D. y = 3 cos 
Answer: B
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Provide an appropriate response.Q = Q0 × 2t/Tdouble is the equation for ________.
A. half-life B. doubling time C. growth or decay D. None of the above.
Use set-builder notation to write the set.{0, 1, 2, . . . , 8}
A. {x 
is a natural number less than 9}
B. {x 
is an integer less than 9}
C. {x 
is a whole number less than 8}
D. {x 
is a whole number less than 9}
Solve the right triangle using the information given. Round answers to two decimal places, if necessary. 
b = 2, B = 20°; Find a, c, and A.
A. a = 5.49 c = 6.84 A = 70° B. a = 5.49 c = 5.84 A = 80° C. a = 5.49 c = 5.84 A = 70° D. a = 5.49 c = 6.84 A = 80°
Use a proportion to solve the problem. Round to the nearest tenth as needed.A building casts a shadow 18 m long. At the same time, the shadow cast by a 44-cm tall pole is 95 cm long. Find the height of the building.
A. 37.4 m B. 6.8 m C. 8.3 m D. 38.9 m