wksht5h - ESP Kouba Worksheet 5 1 2 1 A small herd of wild...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ESP Kouba Worksheet 5 1 / 2 1.) A small herd of wild hogs in the Appalachian Mountains grows at a rate proportional to the number of hogs present at time t. After 2 years there are 100 hogs and after 6 years there are 400 hogs in the herd. a.) How many hogs were there initially ? b.) How many hogs will there be after 10 years ? 2.) Assume that the blood level amount of alcohol (percentage of 1% by volume) decreases exponentially. Initially, the blood level is 0.17 and after one hour the blood level is 0.13. In how many hours will the blood level be 0.08, the threshold for legal intoxication ? 3.) If the amount of a radioactive substance decreases from 9 mg to 5 mg in 36 weeks, how long does it take for 20% of the substance to disintegrate 7 4.) The population of Wendy, Wyoming, was 325 in 1875 and 117 in 2003. Assuming exponential growth, a.) what is the expected population of Wendy in 2100 ? b.) what was the estimated population of Wendy in 1700 ? 5.) Corn silage contains 7 times the allowable amount of iodine 31. The half-life of iodine 31 is 8 days. In how many days will the amount of iodine 31 reach a safe, allowable level ? 6.) A bacterial culture grows at a rate proportional to the amount present. If the weight of the culture increases by 40% in the first 5 hours, how long does it take for the weight to triple ? 7.) According to one cosmological theory, there were equal amounts of two uranium isotopes U 235 and U238 at the creation of the universe in the “big bang.” At present there are 137.7 atoms of U238 for each atom of U 235. Using the half-lives of 4.51 billion years for U 238 and 0.71 billion years for U 235, calculate the age of the universe....
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern