To Start
What is the starting value in the following equation?
y = a(1+r)^t
What is the growth rate in the following equation?
y=a(1+r)^t
'r' is the growth rate
What letter represents time in the following equation?
y=a(1+r)^t
't' represents time
A pair of gold earrings you bought 5 years ago for $100 increased in value by 2% each year. What is the value of the earrings now?
You buy a new laptop for $3,000. It depreciates in value by 40% each year. What is the value in 5 years?
$233
A gold necklace you bought in 2000 for $500 has increased in value by 2% each year. What is the starting value of the necklace?
$500
A home purchased in 1999 for $125,000 has increased in value by approximately 1.5% each year. The current value of the home is $156,250. What is the growth rate?
1.5%
You have deposited $500 in a bank account that pays 8% interest yearly. After 6 years, you have $793. What is the time?
6 years
An investment of $10,000 increased at a rate of 10% interest annually. What is the value of the investment after 10 years.
$25,937
A $12,000 car depreciates at a rate of 5% each year. What is the value in 10 years?
$7,184.84
An initial population of 70 deer doubles each year. In 10 years, the population is 71,680. What number represents 'a'?
70
In the equation: y=a(1-r)^t
What does the 'r' represent?
You bought a car for $5000. It depreciates in value by approximately 3% each year. After 2 years, your car is worth $4704.50. What number would be represented by 't' in the equation: y=a(1-r)^t
2
A model train was bought 20 years ago for $300. The value increased by 2.5% each year. What is the value of the train today?
$491.58
You drink a cup of coffee with 160mg of caffeine. Each your, the caffeine in your system decreases by 15%. How much is left in your system after 3 hours?
98mg
An iphone cost $200 in 2005. It has depreciated in value by 5% each year. The current value of the iphone is $126. What was the initial amount of the iphone?
$200
Bacteria increase by 50% every hour. The staring amount in a petri dish was 6. What is the growth rate?
50%
A house was bought in 1972 for $20,000. It has increased in value by approximately 3.7% each year. How much is the house worth today? (hint: We are in 2018)
$106,378.23
An initial population of 50 crickets increases by 300% each year for 5 years. What is the population now?
51,200
An adult takes 200mg of ibuprofin. Each hour, the amount decreases by 40% in your system. How much is left after 2 hours?
72mg
In the equation: y=a(1+r)^t What does 'a' equal?
Starting Amount
In the equation: y=a(1+r)^t What does (1+r) represent?
The growth factor
Your grandfather bought your grandmother's engagement ring in 1947 for $500. It increased in value by 1.33% each year. What is the value of the ring today?
$1277.52
A piece of land was bought for $70,000 in 1988. If the value of the land increases by 3.7% each year, what is the value of the land today?
$208,190.41
A golf tournament starts with 150 participants. During each round, one quarter of the players are eliminated. How many remain after 10 rounds? (hint: what is 1 quarter worth?)
8 golfers