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Solve the problem. 7) If a population has a growth rate of 6% per year, how...
One radioactive material that is produced in atomic bombs is the isotope strontium-90, which has a...
One radioactive material that is produced in atomic bombs is the isotope strontium-90, which has a half-life of 28 years. If a person is exposed to strontium-90, it can collect in human bone tissue, where it can cause leukemia and other cancers. If an atomic bomb test site is contaminated by strontium-90, how long will it take for the radioactive material to decay to 30% of the original amount? (Round the growth factor to eight decimal numbers. Round your answer...
In the year 2000, the population of a certain country was 276 million with an estimated growth rate of 0.5% per year a. Based on these figures, find the doubling time and project the population in 21...
In the year 2000, the population of a certain country was 276 million with an estimated growth rate of 0.5% per year a. Based on these figures, find the doubling time and project the population in 2120 b Suppose the actual growth rates are ust 0.2 percentage points lower and higher than 0.5% per year 0.3% and 0.7%). What are the resulting doubling times and projected 2120 population? a. Let y(t) be the population of the country, in millions, t...
Complete the following table Population Growth Rate, k Doubling Time, T Country A 2.6% per year...
Complete the following table Population Growth Rate, k Doubling Time, T Country A 2.6% per year Country B 26 years Population Growth Rate, k Doubling Time Country A 2.6% per year !years Country B % per year 26 years Round doubling time to the nearest whole number and round growth rate to the nearest tenth.)
In 2 Use the formula t= that gives the time for a population, with a growth...
In 2 Use the formula t= that gives the time for a population, with a growth rate k, to double, to answer the following questions. The growth model A=70.0071 describes the population, A. of a country in millions, tyears after 2003. a. What is the country's growth rate? The half-life of a certain tranquilizer in the bloodstream is 38 hours. How long will it take for the drug to decay to 84% of the original dosage? Use the exponential decay...
Question 15 5 pts Strontium 90 decays at a constant rate of 2.44% per year. Therefore,...
Question 15 5 pts Strontium 90 decays at a constant rate of 2.44% per year. Therefore, the equation for the amount P of strontium 90 after t years is A = Ao e-0.0244t. How long will it take for 25 grams of strontium to decay to 10 grams? 37.5 years 375 years 60 years 45 years.
Solve the problem. In the formula N - let, N is the number of items in...
Solve the problem. In the formula N - let, N is the number of items in terms of an initial population I at a given time t and k is a growth constant equal to the percent of growth per unit time. How long will it take for the population of a certain country to double if its annual growth rate is 6.3%? Round to the nearest year. None Given Selected Answer: Answers 11 yr 5 yr 1 yr 32...
to Help Country A has a growth rate of 3.7% per year. The population is currently...
to Help Country A has a growth rate of 3.7% per year. The population is currently 4,674,000, and the land area of Country Ais 14,000,000,000 square yards. Assuming this growth rate continues and is exponential, after how long will there be one person for every square yard of land? This will happen in 183 year(s). (Round to the nearest integer.)
Solve the problem. 20) You have a $4286 credit card debt, and you plan to pay it off through monthly payments of S80. If you are being charged 13% interest per 20 year, how long (to the nearest t...
Solve the problem. 20) You have a $4286 credit card debt, and you plan to pay it off through monthly payments of S80. If you are being charged 13% interest per 20 year, how long (to the nearest tenth of a year) will i take you to repay your debt? Find the present value of the ordinary annuity. 21)Payments of $3300 made annually for 2) 25 years at 7% compounded annually Find the future value of the annuity due. 22)_...
Strontium-90 has a half-life of 28 days. Using the exponential decay model Q(t) = Qoe-ht, find...
Strontium-90 has a half-life of 28 days. Using the exponential decay model Q(t) = Qoe-ht, find the k value to 4 decimal places. How long it would take for 150 grams of Strontium-90 to decay to 5 grams. Round your answer to the nearest day. Answer with a complete sentence. Show all work.
6) Solve the problem. 760 6) The logistic growth function f(t) = describes the population of...
6) Solve the problem. 760 6) The logistic growth function f(t) = describes the population of a species of butterfliest months after they are introduced to a non-threatening habitat. How many butterflies were initially introduced to the habitat? 1 +7.4e-0.2 720 7) 7) The logistic growth function f(t) describes the population of a species of 1 + 8.0-0.22 butterflies t months after they are introduced to a non-threatening habitat. What is the limiting size of the butterfly population that the...
In the year 2000, the population of a certain country was 276 million with an estimated growth rate of 0.5% per year a. Based on these figures, find the doubling time and project the population in 2120 b Suppose the actual growth rates are ust 0.2 percentage points lower and higher than 0.5% per year 0.3% and 0.7%). What are the resulting doubling times and projected 2120 population? a. Let y(t) be the population of the country, in millions, t...
Complete the following table Population Growth Rate, k Doubling Time, T Country A 2.6% per year Country B 26 years Population Growth Rate, k Doubling Time Country A 2.6% per year !years Country B % per year 26 years Round doubling time to the nearest whole number and round growth rate to the nearest tenth.)
In 2 Use the formula t= that gives the time for a population, with a growth rate k, to double, to answer the following questions. The growth model A=70.0071 describes the population, A. of a country in millions, tyears after 2003. a. What is the country's growth rate? The half-life of a certain tranquilizer in the bloodstream is 38 hours. How long will it take for the drug to decay to 84% of the original dosage? Use the exponential decay...
Question 15 5 pts Strontium 90 decays at a constant rate of 2.44% per year. Therefore, the equation for the amount P of strontium 90 after t years is A = Ao e-0.0244t. How long will it take for 25 grams of strontium to decay to 10 grams? 37.5 years 375 years 60 years 45 years.
Solve the problem. In the formula N - let, N is the number of items in terms of an initial population I at a given time t and k is a growth constant equal to the percent of growth per unit time. How long will it take for the population of a certain country to double if its annual growth rate is 6.3%? Round to the nearest year. None Given Selected Answer: Answers 11 yr 5 yr 1 yr 32...
to Help Country A has a growth rate of 3.7% per year. The population is currently 4,674,000, and the land area of Country Ais 14,000,000,000 square yards. Assuming this growth rate continues and is exponential, after how long will there be one person for every square yard of land? This will happen in 183 year(s). (Round to the nearest integer.)
Solve the problem. 20) You have a $4286 credit card debt, and you plan to pay it off through monthly payments of S80. If you are being charged 13% interest per 20 year, how long (to the nearest tenth of a year) will i take you to repay your debt? Find the present value of the ordinary annuity. 21)Payments of $3300 made annually for 2) 25 years at 7% compounded annually Find the future value of the annuity due. 22)_...
Strontium-90 has a half-life of 28 days. Using the exponential decay model Q(t) = Qoe-ht, find the k value to 4 decimal places. How long it would take for 150 grams of Strontium-90 to decay to 5 grams. Round your answer to the nearest day. Answer with a complete sentence. Show all work.
6) Solve the problem. 760 6) The logistic growth function f(t) = describes the population of a species of butterfliest months after they are introduced to a non-threatening habitat. How many butterflies were initially introduced to the habitat? 1 +7.4e-0.2 720 7) 7) The logistic growth function f(t) describes the population of a species of 1 + 8.0-0.22 butterflies t months after they are introduced to a non-threatening habitat. What is the limiting size of the butterfly population that the...
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