A population of bacteria doubles every 3 hours. If there are initially 500 bacteria, how many will there be after 12 hours?
Mastering Exponential Models & Logarithmic Applications

Quiz
•
English, Mathematics
•
10th Grade
•
Hard
Anthony Clark
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
8000
4000
2000
10000
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The half-life of a certain radioactive substance is 5 years. If you start with 80 grams, how much will remain after 15 years?
10 grams
5 grams
40 grams
20 grams
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A car's value decreases exponentially. If it is worth $20,000 now and loses 15% of its value each year, what will its value be after 4 years?
12000.50
10440.13
15000.00
8000.75
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The formula for the amount of money A in an account after t years with an initial amount P and interest rate r compounded annually is A = P(1 + r)^t. If you invest $1,000 at an interest rate of 5% for 10 years, how much will you have?
$1,200.00
$1,500.00
$1,628.89
$2,000.00
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the pH level of a solution is given by the formula pH = -log[H+], where [H+] is the concentration of hydrogen ions, what is the concentration of hydrogen ions in a solution with a pH of 3?
1 M
0.001 M
0.01 M
0.1 M
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A certain investment grows according to the model A = Pe^(rt). If you invest $2,000 at an annual interest rate of 4% for 5 years, how much will the investment be worth?
3000.00
2000.00
2442.80
2200.50
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The number of users of a new app is modeled by the function U(t) = 1000e^(0.3t), where t is the time in months. How many users will the app have after 6 months?
4500
7200
5000
6050
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