Select the graph of 
over the interval. Describe the part of the graph obtained in this case.
?
?
A. ?
Upper half of circle
B. ?
Upper half of circle
C. ?
Upper half of circle
D. ?
Upper half of circle
E. ?
Upper half of circle
Answer: A
Mathematics
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Simplify the expression. Use positive exponents. Assume variables represent nonnegative numbers.(8a)(5a2)
A. 40a3 B. 40a4 C. 13a3 D. 8a + 5a2
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Perform the following operation and write the result in lowest terms. 10 + 
A. 2
B. 1
C. 2
D. 9
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Determine the period of the function.Period of y = 7 cos 
A. 
B. 
C. 
D. 
Mathematics
Simplify. Do not use negative exponents in your answer.y-7? y-5
A. 
B. 
C. 
D. y12
Mathematics