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anonymous
 5 years ago
At the beginning of an experiment, a scientist has 112 grams of radioactive goo. After 225 minutes, her sample has decayed to 14 grams.
What is the halflife of the goo in minutes?
Find a formula for , the amount of goo remaining at time.?
How many grams of goo will remain after 26 minutes?
anonymous
 5 years ago
At the beginning of an experiment, a scientist has 112 grams of radioactive goo. After 225 minutes, her sample has decayed to 14 grams. What is the halflife of the goo in minutes? Find a formula for , the amount of goo remaining at time.? How many grams of goo will remain after 26 minutes?

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.114 = 112e^(225r) 14  = e^(225r) 112 ln(1/8) = 225r r = ln(1/8)/225 ................................... y = 112e^(ln(1/8)/225)t lol

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1112/2 = 56 56  = 1/2 ..... im getting dumber by the minute lol 112 ln(1/2)  = halftime rate

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1halflife = 75 minutes

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1and im thinking 8' 2/3 after 26 minutes

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1but that last part is prolly wrong

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1http://www.wolframalpha.com/input/?i=112+e^%28%28ln%281%2F8%29%2F225%29x%29+at+x%3D26 thats better

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0lol ur fine i thank you for trying and helping:)
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