The graph of a piecewise-defined function is given. Write a definition for the function.
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = 
Answer: C
Mathematics
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Solve the problem.On a sunny day, a tree and its shadow form the sides of a right triangle. If the hypotenuse is 
long and the tree is 28 meters tall, how long is the shadow?
A. 49 m B. 45 m C. 63 m D. 21 m
Mathematics
Use the graph to identify domain and range.
A. domain: (-?, ?) range: (-4, ?) B. domain: [-4, ?) range: (-?, ?) C. domain: (-4, ?) range: (-?, ?) D. domain: (-?, ?) range: [-4, ?)
Mathematics
Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500
Mathematics
Simplify.(x9y3)2
A. x11y5 B. x18y6 C. x81y9 D. x9y6
Mathematics