Simple Interest
Compound Interest
More Compound Interest
Exponential Function Characteristics
Exponential Growth and Decay
100

How much money would one have in total if they put $34,000 into a savings account with a 4% interest rate for 3 years? 

What is $38,080.00?

100

If Ellie invests $40,000 into an account that is continuously compounded with an interest rate of 2.6%, how much money will she have accumulated after 14 years? 

What is $57,562.97? 

100

Total value of $1,500 with 7% interest rate that is continuously compounded for 3 years

What is $1.850.52?

100

Does the following function show exponential growth, decay, or neither? Explain why!

f(x)=3(0.99)x

Exponential decay because the b-value (0.99) is less than 1. 

100

What is the y-intercept of the following function?

f(x)=100(9/8)x

100

(0,100)

200

How much interest would you owe if you took out a loan of $210 at 8% for 7 years? 

What is $117.6?

200

What is the amount of money accumulated if you put $1,030 into a savings account with a 4% interest rate compounded semiannually for 2 years? 

What is $1,114.91?

200

The total value accumulated if you start off with $7,300 at 0.7% interest rate compounded daily for 10 years. 

What is $7,829.30? 

200

Does the following function show exponential growth, decay, or neither? Explain why!

f(x)=0.99(3.22)x

Exponential growth because the b-value (3.22) is greater than 1. 


200

What is the horizontal asymptote for the following function: 

f(x)=100(9/8)x

y=0

300

What is the total amount of money that you would have to pay for a $4,000 loan with a 3% interest rate after 4 years? 

What is $4,480.00?

300

Bray took out a 78,024 loan at a 4.9% interest rate, and it is compounded daily. How much would he end up paying in total after 8 years? 

What is $115,467.62?

300

Total value accumulated if you started off with $18,000 at 9% interest rate compounded weekly for 6 years.

What is $30,825.95?

300

Does the following function show exponential growth, decay, or neither? Explain why!

f(x)=4(-1.1)x

Neither exponential growth or decay because the b-value (-1.1) is negative. 


300

TERRIFIC TRIPLE!!!! 

You must get the problem COMPLETELY CORRECT to receive points. 

Ms. Sherrod loves chocolates. Suppose she buys a bag containing 218 chocolates, and every day she eats half of the chocolates in the bag. Use this information to create a model representing this scenario, and then use your model to find out how many chocolates will she will have after 4 days. (Round your answer to the nearest chocolates). 

Model: y=218(1/2)x

After 4 days: 218(1/2)4, which equals 13.6 --> 14 chocolates left


400

If you put $20,600 into a savings account for 2 years and ended up with $3296 in interest, what is the interest rate at that account?

What is 8% or 0.08? 

400

What account would yield you more money if you have $28,600:

Account A: 7.9% interest rate compounded semiannually for 2 years

Account B: 4.8% interest rate compounded daily for 5 years

What is Account B?


Account A yields $33,393.66, while Account B yields $36,357.15. 

400

Oh no, Billy got scammed! He took out a $30,000 loan for 15 years that is compounded daily. He was told that the interest rate would be 5.9%, but the loan contract "forgot" to add the decimal, so in reality the rate is 59%. How much will Billy end up having to pay in total?

What is $207,742,028.40?

400

What is the y-intercept of the following function?

f(x)=2(4.5)x

2

(0,2)

400
Elon Musk's Tesla company sells a variety of electric vehicles ranging in price. Carl buys one of the cheaper ones costing $44,000. Due to recent affairs, the value of the tesla has been decreasing at a rate of 7% per month. How much will Carl's car be worth after 18 months? Create a function to model this situation and solve this problem. 

Model: y=44000(1-0.07)x

Worth after 18 months: 44000(0.93)18= $11,916.42

500

Suppose you are saving up to buy a used car costing $19,821. Right now you have $14,580, and you decide to put it into an account with a 7% interest rate. How long will it take for you to get $19,821? (round your answer to the nearest year)

What is 5 years? 

500

How much money is accumulated if $130 is put into an account with a 9.4% interest rate that is compounded each minute, for 12 years?

What is $401.63?

500

$21,000 at 13.6% compounded every 4th month for 17 years

What is $201,471.71? 

500

What is the horizontal asymptote of the following function?

f(x)=2(4.5)x

y=0

500

Yay, Billy landed the big bucks! He won the lottery, and buys a Malibu mansion for $16,208,557.00 Suppose the value of the mansion appreciates at a rate of 4.7% per year. How much will the house be worth after 10 years? Create a model to help you answer the question. 

Model: y=16,208,557(1.047)10

The house will be worth $25,657,312.83 after 10 years.