The landscaper pours 200 gallons of herbicide in a pond. The herbicide degrades 10% each week write an equation to find the amount of herbicide in any given week. How much will be in the pond after 1 week. The landscaper will put another dose in the pond when the herbicide level drops below 50 gallons. In about how many weeks will he need to add more herbicide.

Q: Felix used to weigh 250 pounds. After a year of careful dieting and exercise, he weighs 185 pounds.…

A: Given: Felix used to weigh 250 pounds. After a year of careful dieting and exercise, he weighs 185…

Q: A sofa regularly sells for $620. The sale price is $489.80. Find the percent decrease of the sale…

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Q: Ahmad earned 4 times more money babysitting last month than his sister Rachel. If Rachel earned $28…

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Q: In the year 2015 Smallsville had a population of 37,000.  Over the next 5 years, the town grew by…

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Q: By increasing her usual speed by 15 kilometers per hour a bus driver decreases the time on a 15…

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Q: The price of one share of acme company declined $3.50 per day for 4 days in a row. What was the…

A:

Q: Katie and Beth had the same number of marbles on January 1st. By the end of the year, Katie's…

A: Let, they both owned x marbles on January 1st.    Katie's collection increased by 25%, so now Katie…

Q: The average price of a home in Sunnyville was $86,000 in 2017, but home prices have been falling by…

A:

Q: The number of registered vehicles on the road in the United States is constantly increasing. In…

A: Given ,in 2013 number of registered vehicles were approximately 256 million Also given, This…

Q: A sofa regularly sells for $540. The sale price is $513.00. Find the percent decrease of the sale…

A: Given information Original price of sofa=$540 Sale price of sofa=$513 We have to find the percent…

Q: The price of an item has dropped to $119 today. Yesterday it was $140, Find the percentage decrease.…

A: Here I am attaching image so that you understand each and every step.

Q: The number of hours left in the day is half the number of hours already passed.       How many…

A: It is given that, the number of hours left in a day is half the number of hours already passed. Let…

Q: The price of a gallon of milk is increasing at a rate of 1 % per year. If a gallon of milk costs…

A: Given gallon of milk cost is $3.5 in 2014It is increasing at a rate of 1% per yearWe should…

Q: A sofa regularly sells for $850. The sale price is $739.50. Find the percent decrease of the sale…

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Q: Garrett, Justin, and Derek invested a total of $720,000 in the ratio of 6:2:10 to start a business.…

A:

Q: Grace Yasui owns a gift shop that had sales of $210,000 in October. Because of the Thanksgiving and…

A: Given, Sales in October(Base value B)=$210,000 Rate of increase(R)=125% Increase in Sales(Percentage…

Q: A dress regularly sells for $121. The sale price is $92. Find the percent decrease of the sale price…

A:

Q: In 2011, Americans spent an average of 13.6 % of their monthly earnings on mortgage payments, which…

A: Let x be the average monthly earnings of an American. Assuming this monthly average is same for the…

Q: Alex invests $1000 in his company's stock. After a year the value of Alex's stock has increased to…

A: Consider the rate of return is r%, so after one year the value of an investment becomes, A=P1+r100

Q: Jan's electric bill is averaging $10 per day mostly due to the air conditioner. By setting the AC to…

A:

Q: A couple has $25,000 in their retirement savings today. How many years do they have to save at 6%,…

A: Fixed amout that he have in starting = 25000 Let for x years he invest so, amount taken on 25000…

Q: Willy Wonka realized that at a price of 9 dollars for every chocolate bar, 550 pieces of chocolate…

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Q: You pay $300 for canning supplies plus $0.40 for each food item you can. a. How many canned items…

A: The average cost function is

Q: Find each percent change. Carolyn will receive a 5% increase in pay this year, and a 6% increase…

A: Carolyn will receive a 5% increase in pay this year, and a 6% increase next year. A kitchenware…

Q: A house on the market was valued at $316,000. After several years, the value increased by 8%. By how…

A: Initial value of the house = $316000 Percentage increase in value = 8% Therefore, amount of increase…

Q: The price of an item has risen to $294 today. Yesterday it was $120. Find the percentage increase.

A: Given: Tody's price= 294 dollars Yesterday's price =120 dollars The increased price =$294-$120…

Q: The next model of a sports car will cost 14.9% more than the current model. The current model costs…

A: current price = 31000 price of next car will be 14.9% more than the current price

Q: The standard markup in the book industry is 50%: the retail price of a book is one and one half…

A:

Q: The number of IDeL DE students in Pusiga was 284 in 2013. It is estimated that the IDeL DE student…

A:

Q: A farmer bought a scratch ticket and found out later that he won $1,800,000. After 30% was deducted…

A: We use the formula                I=PTR/100 Where I=Interest            P=principal amount…

Q: The next model of a sports car will cost 3.4% more than the current model. The current model costs…

A: Given, the current car model price that is cost price =$57000 and the increment is of 3.4%

Q: Andrew filled 5 boxes in 35 minutes. paige worked for 75 minutes at a faster rate than Andrew.Select…

A: Aptitude based problem solved here.

Q: Each year the value of a company increases by 2%. At the start of 2012, the value of the company was…

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Q: Alex invests 2000 in a company's stock, after a year her stock increase to 2500, what rates of…

A: Given:   Money invested by Alex in company stock = $2000.   After a year, Alex stock increased to…

Q: A house on the market was valued at $249,000. After several years, the value Increased by 7%. By how…

A:

Q: sal saves $55 per month, express his total savings for x years as an express in terms of x

A: We will use that 1 year =12 months

Q: Food prices risen about 4% per year for the past five years. If a gallon of milk cost $2 five years…

A: This problem can be solved by the concept of percentage as explained in step 2.

Q: An underground gasoline storage tank is leaking. The tank currently contains 600 gallons of gasoline…

A:

Q: Jesse rode his bike for 2 hours at a constant rate. During the first 1.5 hours, he rode 15 miles.…

A: Given: speed is constant throughout. total time = 2 hours distance covered in first 1.5 hours = 15…

Q: How much is Brent saving per month?

A:

Q: 6)Every year on Earth​ Day, a group of volunteers pick up garbage at Hidden Falls Park. The time it…

A: We, formulate an algebraic relation between time and number of volunteers to obtain the time it…

Q: Carl invested $10000 into a CD that compounds quarterly with an annual interest rate of 4.5%.…

A: Given Carl invested $10000 into a CD that compounds quarterly with an annual interest rate of 4.5%.…

Q: Approximately 50% of newborn babies weigh more than pounds. What percent of newborn babies weigh…

A: The mean is 7.5 and the standard deviation is 0.6.

Q: A cell phone costs $750 and loses 28% of its value each year. What is the value of the phone after 2…

A: The given question can be solved in step2.

Q: The number of farms in a country was 2.19 million in 2000. By 2006, the number had dropped to 2.08…

A:

Q: The price of an item has risen to $324 today. Yesterday it was $135. Find the percentage increase.

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Q: 4) Alberto has $200, and spends $5 every week. Jean starts with zero dollars, but is saving $10…

A: Given albert has total $200 He spends $5 every week   Therefore in x week he spend $5x

Q: The winner of a 1000 mile ease drove his car to victory at a rate of 134.8617 mph. What was his…

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Q: Kyle is entering high school and is determined to save money for college. Kyle feels he can save…

A: Answer:-

Q: A sofa regularly sells for $800. The sale price is $680.00. Find the percent decrease of the sale…

A: