The initial population of a town is 2900, and it grows with a doubling time of 19 years. Determine how long it will take for the population to quadruple. It will take the population how many years to quadruple?

Q: At the beginning, an experiment records 1 gram of bacterial culture, and the culture's weight is…

A: we have to find weight at t=10 hr.

Q: A body at a temperature of 50°F is placed outdoors where the temperature is 100°F. If after 5…

A: Newton's Law of Cooling states that the rate of change of the temperature of an object is…

Q: If Sandago has a present population of 70,000,and the population is increasing by 3% each year.…

A: First we construct the function for population for  some year t

Q: The population of a city is 259,000. The population declines by 3.2% every year, what will the…

A: Ans= 159012  Detailed solution I have done step by step....go through the solution

Q: An experienced roofer can roof a house in 34 hours. A beginning roofer needs 51 hours to complete…

A:

Q: Elaine can complete a landscaping project in 8 hours with the help of either her husband Brian or…

A: Given,   Elaine+Brain →8 hours                   E        B                  Elaine+two…

Q: Deanna can finish a certain job in 10 days. Jessica can finish the same job in 14 days. If Deanna…

A:

Q: An inlet pipe can fill a backyard pool in 10 hours, while the drain can empty it in 12 hours. If…

A: The fraction of the pool fill in 1 hour will be 110. The fraction of the pool drain in 1 hour will…

Q: One pump fills a tank 4 times as fast as another pump. If the pumps work together, they fill the…

A: Let V ; volume of tank to be filled and T time taken by faster pump (in minutes)

Q: A train travelsa distance of 300 km at constant speed.If the speed of the trainis increased by 5km…

A:

Q: A pump can pump out a tank in 11 hours. Another pump can pump out the same tank in 20 hours. How…

A: NOTE: Refresh your page if you can't see any equations. . A pump can pump out a tank in 11 hours.…

Q: John can complete a monthly report in 50 minutes. Sharon can complete it in 40 minutes. How long…

A: John complete a monthly report in 50 minutes and Sharom complete a monthly report in 40 minutes.

Q: Each day, the nuber of births in the world exceeds twice the number of deaths by 72 thousand. a.)…

A: (a) Let us assume that m represent the number of deaths (thousand) and n represent the number of…

Q: The sum of the ages of a wood plaque and a bronze plaque is 20 years. Fouryears ago, the bronze…

A: Given: The sum of the ages of a wood plaque and a bronze plaque is 20 years. Fouryears ago, the…

Q: The distance between New York and London is 3469 miles. If an airplane has a cruising speed of 350…

A:

Q: The average height of a giraffe is about 2 x 10^1 feet. The average height of an ant is about 4 x…

A:

Q: It takes the cold water faucet as long to fill a bathtub as it does the hot water faucet. Left on…

A:

Q: A squirrel starts the winter with a full supply of food stored. If, cach week, the squirrel eats 12%…

A: A squirrel starts the winter with a full supply of food stored.every week, the squirrel eats 12% of…

Q: The current population of a threatened animal species is 1.9 million, but it is declining with a…

A: Given that the population of a threatened animal species is 1.9 million , that is 1,900,000 , but it…

Q: A small pipe can fill a tank in 8 min more time than it takes a larger pipe to fill the same tank.…

A: Given Data The time to fill the tank by a small pipe is ts=(a+8) min. The time to fill the tank is…

Q: The age of the older of two boys is twice that of the younger; 5 years ago it was three times that…

A:

Q: An experienced roofer can roof a house in 18 hours. A beginning roofer needs 27 hours to complete…

A: An experienced roofer can roof a house in 18 hours. A beginning roofer needs 27 hours to complete…

Q: . The population of a community will be treble by the year 2009. If the population in the year 1998…

A: We have to solve the given problem.

Q: The tank can be filled with water from two taps. The first tap fills the empty tank in 2 hours less…

A:

Q: A body at a temperature of 50°F is placed outdoors where the temperature is 100°F. If after 5…

A: Given that, the temperature of a body is 50°F which is placed outdoors where the temperature is…

Q: fibernet offers 500 megabyte per second internet service for $25 per month with a $50 installation…

A: Given: Installation fee for fibernet = $50 Charges per month for fibernet = $25 Installation fee for…

Q: 6. Martin is currently four times as old as his brother Luther. After 10 years, he will be twice the…

A:

Q: how long will it take for her to have enough money for her project?

A: The compounded interest formula is expressed as A=P1+rnnt Where, P is initial amount, r is the…

Q: It takes the cold water faucet twice as long as long to fill a bathtub as it does the hot water…

A: Assume time taken to fill the bath tub by, cold water faucet = t1hot water faucet   = t2Both hot…

Q: Light travels at a rate of 186,000 miles per second. If our moon is 238,860 miles from Earth, how…

A: We know, Speed = DistanceTime ⇒ Time = DistanceSpeed

Q: A small pump can drain a pool in 7 hours. A large pump could drain the same pool in 4 hours. How…

A: Let the time needed to drain the pool if both pump used simultaneously is x. Use the formula,…

Q: Janes mother is 3 times as old as Jane, and in 16 years from now she will be twice as old as Jane is…

A:

Q: A small pipe can fill a tank in 6 min more time than it takes a larger pipe to fill the same tank.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: la) The sum of the ages of Afful and Naomi is 34years. Five years to come, Afful will be 2 times the…

A:

Q: George can complete a project in 75 minutes, and if George and Walter both work on the project, they…

A: It is given that George can complete a project in 75 minutes. So, the George's rate of completion is…

Q: At Janice's current age she is not only 5 times as old as Ross, but she is also 28 years older than…

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Q: A workman’s basic hourly wage is $10, but he receives one and a half times his hourly rate for any…

A: Given- A workman’s basic hourly wage is $10, but he receives one and a half times his hourly rate…

Q: Working alone, Arjun can tar a roof in 8 hours. Mark can tar the same roof in 15 hours. If they work…

A:

Q: A small pipe can fill a tank in 6 min more than it takes a larger pipe to fill the same tank.…

A: A small pipe can fill a tank in 6 min more than it takes a larger pipe to fill the same tank.…

Q: You have 160 grams of a substance. If it has a half life of 8 days, how much will be left after 32…

A: You have 160 grams of a substance. If it has a half life of 8 days, how much will be left after 32…

Q: If it takes 10 people 10 days to dig a hole, how long will it take 5 people to dig half a hole?

A:

Q: A foundation invests $70,000 at simple interest, a part at 7%, twice that amount at 4%, and the rest…

A: Given, a foundation invests $70,000 at simple interest, a part at 7%, twice that amount at 4%, and…

Q: If a country with a growth rate of 2.8% can double its population size in 24 years, then how long…

A: If a country with a growth rate of 2.8% can double its population size in 24 years, then how long…

Q: A total of $⁢5000 is invested: part at 5% and the remainder at 15% How much is invested at each rate…

A:

Q: Suppose a particular antibiotic that is introduced to a petri dish containing 3000 newly discovered…

A: Introduction: Arithmetic sequence and geometric sequence are two important sequences in mathematics.…

Q: A thrice as good a workman as B and therefore is able to finish a job in 60 days less than B. by…

A:

Q: A man’s age is 36 and that of his daughter is 3 years. In how many years will the man be 4 times as…

A: Man's age = 36 Daughter's age = 3  Let after x years man will be 4 times as old as his daughter

Q: A printing machine can run the necessary copies of the daily circulation of a newspaper in 8 hours.…

A:

Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.