A radioactive substance has a half-life of 5 years. If you start with 80 grams, how much will remain after 15 years?
Exponential Growth & Decay: Half-Life & Doubling Time Quiz

Quiz
•
English, Mathematics
•
10th Grade
•
Hard
Anthony Clark
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
40 grams
5 grams
20 grams
10 grams
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A population of bacteria doubles every 3 hours. If you start with 500 bacteria, how many will there be after 12 hours?
8000
1000
16000
4000
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A certain type of tree grows at a rate of 10% per year. If the tree is currently 2 meters tall, how tall will it be in 5 years?
2.5 meters
4.0 meters
5.0 meters
3.22 meters
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A car's value decreases by 20% each year. If the car is worth $20,000 now, what will its value be after 3 years?
$15,000
$8,000
$10,240
$12,500
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A culture of yeast doubles in size every 4 hours. If you have 250 grams of yeast, how much will you have after 16 hours?
500 grams
1000 grams
2000 grams
4000 grams
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A certain medication has a half-life of 8 hours. If a patient takes 200 mg, how much of the medication will be in their system after 24 hours?
25 mg
50 mg
100 mg
10 mg
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A bank account earns 5% interest compounded annually. If you deposit $1,000, how much will you have after 10 years?
1500.00
1200.50
2000.00
1628.89
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