Choose the equation that matches the graph.
A. x2 = 8y
B. y2 = 8x
C. y2 = -8x
D. 8y2 = x
Answer: B
Mathematics
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The half-life of a certain radioactive substance is 5 years. What is the yearly percentage decay rate for this substance? Round your answer to two decimal places if necessary. ?
A. 10.65% B. 12.94% C. 13.87% D. 10%
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Find the exact value of the expression in degrees without using a calculator or table.cot-1 
A. 90° B. 45° C. 180° D. 135°
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Subtract.
A. 64,277 B. 64,257 C. 68,283 D. 64,283
Mathematics
Use a calculator to graph the function. y = 
A. 
B. 
C. 
D. 
Mathematics