4X Abrupt Decay Popular Q&A

Q: How long woulf 4x10^20 atoms decay to 1x10^19 atoms if their 1/2l...
A: 4*10^20/1*10^19 = 40. That takes n half lives, where. (1/40) = (1/2)n. n*log 1/2 = log 1/40. n = log (1/40) / log (1/2) = 5.32 half lives. = 78.23 years to 2 dp... Read More »

Q: Is the equation an example of growth or decay? y = 0.5(4)x?
A: The question is ambiguous as stated, but if x is increasing, y is increasing, so we could claim it is an example of growth. The reason is y= .5(4)x = 2x, a line... Read More »

Q: Matching. HELP!!!!!!!!!!!? (A)Expondential Growth (B)Exponential ...
A: 1. y=5(10.4)x --- y=52x straight line 2. y=3/4(3)x --- y = 3/4 * 3 * x = y = 9/4 x straight line 3. y=log4(x) --- logarithm 4. y=log(x) --- logarithm 5. y=11(2/... Read More »

Q: 4. determine if the equation y=2(0.4)^x represents exponential gr...
A: Assuming x is positive. 4. is decay since as x increases , 0.4^x will get smaller. 6. is growth since as x increases, 5^x will get greater at an ever increasing... Read More »

Q: Does the equation y = 1.5(2.4)x represent growth or decay?
A: Generally, growth/decay formula is in the form of AB^x. Please check your text book. When B is more than 1, it is growth, less than 1, it shows a decay. Also, i... Read More »

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