Solve.In a chemical reaction, substance A decomposes at a rate proportional to the amount of A present. It is found that 14 g of A will reduce to 7 g in 4.8 hours. After how long will there be only 1 g left?
A. 13.8 hours
B. 18.3 hours
C. 24.8 hours
D. 13.5 hours
Answer: B
Mathematics
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B. y = 
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C. y = 
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D. y = 
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A. {16, -16} B. {112.5} C. {15, -15} D. {15}
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Solve the problem.If m varies directly as p, and m = 20 when p = 4, find m when p is 8.
A. 16 B. 25 C. 64 D. 40
Mathematics