Simplify.25 + 13 ? 21
A. 59
B. 798
C. 346
D. 298
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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Graph a line that is parallel to the given line and passes through the given point.
A. 
B. 
C. 
D. 
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Radium - 226 has a half-life of 1600 years. Suppose we have a 300 g sample. (a) Find a formula for the mass remaining after t years. (b) How much of the sample remains after 200 years? (c) After how long will only 20 g remain?
What will be an ideal response?
Mathematics