Find the exact value of the expression.cos-1
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve the problem.The weight in pounds of ten randomly-selected football players are as follows. Find the midrange of these weights. 
A. 248 lb B. 251 lb C. 250 lb D. 243 lb
Mathematics
Find all values of ? in [0°, 360°) that satisfy the equation.cos ? = - 
A. 150°, 210° B. 210°, 330° C. 60°, 300° D. 60°, 120°
Mathematics
Evaluate the integral.
a. 1/2
b.
c. -1/4
d. 1/4
e. divergent
Mathematics
A person stands directly in front of two speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 4.90 m from one of the speakers and 4.93 m from the other. What is the frequency (in Hz) of the tone being emitted? (Assume air temperature to be 20°C.)
Mathematics