1. The population of Normal, Illinois grows proportionally to its population at time t. At an initial population of 1500, it grows at a rate of 12% over 9 years. What is the value of the proportionality constant? a. 0.01259/yr b. 0.004435/yr c. 0.004856/yr d. 0.00767/yr 2. What is the population of Normal, Illinois in 30 years? a. 2188 people b. 3655 people c. 2643 people d. 5553 people 3. A sample of organic origin was tested to determine its approximate age. About 52% of its C-14 had decayed. Use a half life value of 5730 years to determine how old the sample is. a. 6067.37 years b. 11,136 years c. 8219 years d. 17,527 years 4. A prehistoric artifact was recently found off the coast of Borneo. Based on carbon dating, approximately 88% of the C-14 remained. Use the half-life of C-14 as 5,730 years. What is the approximate age of the artifact? a. 1057 years b. 2489 years c. 5406 years d. 3819 years 5. A 400-L tank initially contains 40 kg of KCl. There is an incoming flow rate of 8 L/min of a 2 kg KCl/L solution, The exiting flow rate is the same as the incoming flow rate. What is the value of c? a. 730 b. 760 kg c. 740 kg d. 750 kg
1. The population of Normal, Illinois grows proportionally to its population at time t. At an initial population of 1500, it grows at a rate of 12% over 9 years. What is the value of the proportionality constant?
a. 0.01259/yr
b. 0.004435/yr
c. 0.004856/yr
d. 0.00767/yr
2. What is the population of Normal, Illinois in 30 years?
a. 2188 people
b. 3655 people
c. 2643 people
d. 5553 people
3. A sample of organic origin was tested to determine its approximate age. About 52% of its C-14 had decayed. Use a half life value of 5730 years to determine how old the sample is.
a. 6067.37 years
b. 11,136 years
c. 8219 years
d. 17,527 years
4. A prehistoric artifact was recently found off the coast of Borneo. Based on carbon dating, approximately 88% of the C-14 remained. Use the half-life of C-14 as 5,730 years. What is the approximate age of the artifact?
a. 1057 years
b. 2489 years
c. 5406 years
d. 3819 years
5. A 400-L tank initially contains 40 kg of KCl. There is an incoming flow rate of 8 L/min of a 2 kg KCl/L solution, The exiting flow rate is the same as the incoming flow rate. What is the value of c?
a. 730
b. 760 kg
c. 740 kg
d. 750 kg
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