After 20 years a quantity of a radioactive substance has decayed to 60 grams, and at...
After 20 years a quantity of a radioactive substance has decayed to 60 grams, and at the end of 50 years to 40 grams. How many grams were there in the first place?
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After 20 years a quantity of a radioactive substance has decayed
to 60 grams, and at...
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has...
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has decayed to 36 grams. Write an exponential equation f(t) representing this situation. (Let f be the amount of radioactive substance in grams and t be the time in minutes.) f(t) 250e 0.0087t x To the nearest minute, what is the half-life of this substance? 89 min Use the model for continuous exponential decay, y = Ao e-kt, where y is the amount of radioactive...
Modeling Exponential Growth and Decay A scientist begins with 240 grams of a radioactive substance. After...
Modeling Exponential Growth and Decay A scientist begins with 240 grams of a radioactive substance. After 250 minutes, the sample has decayed to 34 grams. a. Rounding to four decimal places, write an exponential equation, R(t) = Aekt, representing this situation, using the variablet for minutes. R(O) = b. To the nearest minute, what is the half-life of this substance? The half-life is approximately minutes.
At the beginning of an experiment, a scientist has 108 grams of radioactive goo. After 240...
At the beginning of an experiment, a scientist has 108 grams of radioactive goo. After 240 minutes, her sample has decayed to 3.375 grams. What is the half-life of the goo in minutes? Preview How many grams of goo will remain after 99 minutes? Preview How many grams of goo will remain after 218 minutes? Preview Round your answers to the nearest tenth as needed. Get help: Video Drintendent
a radioactive substance has a mean life of 20 years. assume we start with 255 kg...
a radioactive substance has a mean life of 20 years. assume we start with 255 kg of the substance. how many kg of the substance will be left at 366 years.
At the beginning of an experiment, a scientist has 348 grams of radioactive goo. After 195...
At the beginning of an experiment, a scientist has 348 grams of radioactive goo. After 195 minutes, her sample has decayed to 43.5 grams. What is the half-life of the goo in minutes? Find a formula for G(t), the amount of goo remaining at time t. G(t) How many grams of 800 will remain after 77 minutes? You may enter the exact value or round to 2 decimal places
At the beginning of an experiment, a scientist has 368 grams of radioactive goo. After 210...
At the beginning of an experiment, a scientist has 368 grams of radioactive goo. After 210 minutes, her sample has decayed to 46 grams. What is the half-life of the goo in minutes? Find a formula for G(t), the amount of goo remaining at time t. G(t) = How many grams of goo will remain after 41 minutes? You may enter the exact value or round to 2 decimal places. Question Help: Video
a radioactive substance has a mean life of 20 years
a radioactive substance has a mean life of 20 years
Radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is A(t)=100(1.6)^(-t)
Radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is A(t)=100(1.6)^(-t). a) Determine the function A’, which represent the rate of decay of the substance. b) what is the half-life for this substance? c) what is the rate of decay when half the substance has decayed?
A radioactive substance has a decay rate of 0.064 per minute. How many grams of a...
A radioactive substance has a decay rate of 0.064 per minute. How many grams of a 150 gram sample will remain radioactive after 45 minutes? Round the answer to the nearest tenth of a gram, and do not include the unit in your answer. Sorry, that's incorrect. Try again? 147.1
The number of grams A of a certain radioactive substance present at time, in years from...
The number of grams A of a certain radioactive substance present at time, in years from the present, t is given by the formula A=45e^-0.0045t What is initial amount of this substance What is half-life of this substance How much will be around in 2500 years
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has decayed to 36 grams. Write an exponential equation f(t) representing this situation. (Let f be the amount of radioactive substance in grams and t be the time in minutes.) f(t) 250e 0.0087t x To the nearest minute, what is the half-life of this substance? 89 min Use the model for continuous exponential decay, y = Ao e-kt, where y is the amount of radioactive...
Modeling Exponential Growth and Decay A scientist begins with 240 grams of a radioactive substance. After 250 minutes, the sample has decayed to 34 grams. a. Rounding to four decimal places, write an exponential equation, R(t) = Aekt, representing this situation, using the variablet for minutes. R(O) = b. To the nearest minute, what is the half-life of this substance? The half-life is approximately minutes.
At the beginning of an experiment, a scientist has 108 grams of radioactive goo. After 240 minutes, her sample has decayed to 3.375 grams. What is the half-life of the goo in minutes? Preview How many grams of goo will remain after 99 minutes? Preview How many grams of goo will remain after 218 minutes? Preview Round your answers to the nearest tenth as needed. Get help: Video Drintendent
At the beginning of an experiment, a scientist has 348 grams of radioactive goo. After 195 minutes, her sample has decayed to 43.5 grams. What is the half-life of the goo in minutes? Find a formula for G(t), the amount of goo remaining at time t. G(t) How many grams of 800 will remain after 77 minutes? You may enter the exact value or round to 2 decimal places
At the beginning of an experiment, a scientist has 368 grams of radioactive goo. After 210 minutes, her sample has decayed to 46 grams. What is the half-life of the goo in minutes? Find a formula for G(t), the amount of goo remaining at time t. G(t) = How many grams of goo will remain after 41 minutes? You may enter the exact value or round to 2 decimal places. Question Help: Video
A radioactive substance has a decay rate of 0.064 per minute. How many grams of a 150 gram sample will remain radioactive after 45 minutes? Round the answer to the nearest tenth of a gram, and do not include the unit in your answer. Sorry, that's incorrect. Try again? 147.1
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