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Q 1/10
Score 0
A radioactive substance decays by 20% each year. If there were initially 1000 grams of the substance, how much will remain after 3 years?
30
600
800
400
512
Q 2/10
Score 0
A car depreciates in value by 15% each year. If the initial cost of the car is $20,000, how much will the car be worth after 5 years?
30
$15000
$17000
$12000
$8874
10 questions
Q.
A radioactive substance decays by 20% each year. If there were initially 1000 grams of the substance, how much will remain after 3 years?
1
30 sec
Q.
A car depreciates in value by 15% each year. If the initial cost of the car is $20,000, how much will the car be worth after 5 years?
2
30 sec
Q.
A colony of bees increases by 50% each month. If the initial population is 3000, how many bees will there be after 2 months?
3
30 sec
Q.
A tree grows 25% taller each year. If the tree is initially 2 meters tall, how tall will the tree be after 3 years?
4
30 sec
Q.
A population of bacteria doubles every 3 hours. If the initial population is 200, how many bacteria will there be after 12 hours?
5
30 sec
Q.
A computer virus is spreading exponentially and the number of infected computers doubles every hour. If there are initially 5 infected computers, how many computers will be infected after 8 hours?
6
30 sec
Q.
A certain type of bacteria decreases by 30% every hour. If there were initially 7000 bacteria, how many bacteria will remain after 3 hours?
7
30 sec
Q.
The value of a classic car increases by 10% each year. If the car is initially worth $50000, how much will the car be worth after 6 years?
8
30 sec
Q.
A type of fish population in a lake increases by 20% each year. If there are initially 1000 fish, how many fish will there be after 4 years?
9
30 sec
Q.
A radioactive substance decays by 2% each day. If there were initially 500 grams of the substance, how much will remain after 10 days?
