i.
To state: The first term and the common ratio r if Mr. Argentieri deposits $100 at the end of each month into an account that pays 8 percent interest compounded monthly. After 10 years, the balance in the account, in dollars, is
The first term 100 and common ratio
Given information:
After 10 years, the balance in the account, in dollars, is
Explanation:
The given sequence is:
The balance shows a geometric sequence. The first term of the sequence is:
Then the common ratio is:
Therefore, the common ratio r is equal to
ii.
To calculate: The sum of geometric sequence of the balance.
The answer is
Given information:
After 10 years, the balance in the account, in dollars, is
Formula used: The sum of a finite geometric sequence
Calculation:
Consider the given sequence:
The sequence starts from 0 to 119, so there are 120 terms in the sequence.
Substitute the values in the sum formula
Therefore, the sum is
Chapter 9 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
- Let z(x, y) = xºy where x = t³ & y = tº. dz dx dy Calculate by first finding & and using the chain rule. dt dt dtarrow_forwardLet x(x, y) = −6e² sin(y) where x = ƒ³ & y = 5πt. dz dx dy Calculate by first finding & and using the chain rule. dt dt dtarrow_forwardCalculate sin(10y(2)) where y is the solution of 4.149 12x²y" + 23xy' + 2y : - x such that y(1) = 1, y′(1) = 0, by finding two solutions to the homogeneous equation of the form x and then using the method of variation of parameters. -0.842 0.035 -0.708 -0.109 0.226 0.092 -0.377 -0.274arrow_forward
- A New Heating System A homeowner wants to replace their old heating system. Energy is measured in kilowatt-hours (kWh). It takes about 11,700 kWh of energy to heat the house for the winter. The current heating system uses natural gas and is 60% efficient, which means that for every 100 kWh of natural gas it uses, it produces 60 kWh of heat. With the homeowner's current system, it costs $975 to heat the house. Assume that natural gas costs $0.05/kWh and electricity costs $0.21/kWh. The homeowner also has an air conditioner that uses 2,500 kWh of electricity per year and produces 290 kWh of cooling for every 100 kWh it uses. They also have a water heater that uses 4,300 kWh of electricity per year and produces 90 kWh of heat for every 100 kWh it uses. These systems could also be replaced if there is a cheaper option, but it isn't necessary. Here are three other types of heating systems the homeowner could replace their current system with: • A new furnace which also runs on natural gas…arrow_forwardFind a unit normal vector to the surface f(x, y, z) = 0 at the point P(-3,4, -32) for the function f(x, y, z) = In -4x -5y- Please write your answer as a vector (a, b, c) with a negative z component, and show your answer accurate to 4 decimal placesarrow_forwardFind the differential of the function f(x, y) = 2x² - 2xy – 5y² at the point (-6, -5) using Ax = 0.3 and Ay = 0.05. dz = Now find Az and compare it to your answer above Ax= Hint: If entering a decimal, round to at least 5 placesarrow_forward
- Find the differential of the function f(x, y) = −8x√y at the point (1,3) using Ax = 0.25 and Ay = -0.15. dz Now find Az and compare it to your answer above Az = Hint: If entering a decimal, round to at least 5 placesarrow_forwardplease dont use chat gpt i need to underarrow_forwardChris Lynch plans to invest $200 into a money market account. Find the interest rate that is needed for the money to grow to $1,800 in 12 years if the interest is compounded quarterly. The rate is %. (Round to the nearest percent.)arrow_forward
- Find the interest earned on $10,000 invested for 6 years at 6% interest compounded as follows. a. Annually b. Semiannually (twice a year) c. Quarterly d. Monthly e. Continuouslyarrow_forward6.9x y= 100-x a. Find the cost of removing each percent of pollutants: 50%; 70%; 80%; 90%; 95%; 98%; 99%. 50% y = 70% y = 80% y = 90% YF 95% y = 98% y= 99% V =arrow_forwardThe cost per ton, y, to build an oil tanker of x thousand deadweight tons was approximated by 215,000 C(x)= x+485 C(25) C(100) C(300) =1 C(50) = = C(200) = C(400) =arrow_forward
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning





