
Quiz in MATH 223 - Part 2
Authored by Engr. RSR
Other
University

AI Actions
Add similar questions
Adjust reading levels
Convert to real-world scenario
Translate activity
More...
Content View
Student View
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
At 1:00 P.M., a thermometer reading 70°F is taken outside where the air temperature is -10°F (10 below zero). At 1:02 P.M., the reading is at 26°F. At 1:05 P.M., the thermometer is taken back indoors, where the air is at 70°F. What is the temperature reading at 1:09 P.M.?
56°F
65°F
44°F
60°F
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The rate of population growth of a country is proportional to the number of inhabitants. If the population of a certain country now is 40 million and 50 million in 10 years time, what will be its population 20 years from now?
62.5 million
65.20 million
56.20 million
52.60 million
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Radium decomposes at a rate proportional to the amount at any instant. In 100 years, 100 mg of radium decompose to 96 mg. How many mg will be left after 100 years?
88.60
95.32
92.16
90.72
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A radioactive substance has a mass of 100 mg. After 10 years, it has decayed to a mass of 75 mg. What will the mass of the substance be after another 10 years?
56.25 mg
34.36 mg
49.34 mg
63.12 mg
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The substance decomposed at a rate proportional to the amount present. What is the half life of the substance if 90% decomposes in 100 years?
568 years
465 years
658 years
586 years
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
If a culture of particular type of yeast, the amount active ferment doubles in 3 hours, how much active ferment in 15 hours?
32Q₀
101.82Q₀
45Q₀
107.5Q₀
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The rate at which a chemical substance decomposes is proportional to the amount of the substance still unchanged. What is the proportionality constant if the amount of the substance changes from 1000 grams to 500 grams in 2 hours.
– 0.897
– 0.378
– 0.347
– 0.98
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever
or continue with

Microsoft
%20(1).png)
Apple
Others
Already have an account?