{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# Quiz9 - MAC1147 Quiz#9 In the top-right corner of a clean...

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

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MAC1147: Quiz #9 11/3/2009 In the top-right corner of a clean sheet of paper, write your name, UFID, and section number. Please use a pen with blue or black ink. When you are nished, FOLD your paper in half lengthwise and write your name on the back. 1. For each of the following situations, state whether an exponential growth model, an exponential decay model, a logistic growth model, or a learning curve model is most appropriate to analyze the problem. (a) Francium-233 is one of the fastest decaying radioactive isotopes that occurs in nature, with a half-life of 22 minutes. Suppose you need to know how long it takes for a given sample to decay until there is only 10% remaining. (b) Suppose you have a particular strain of black mold which you think might be more virulent than other strains. To test this you want to measure how long it takes a few spores to develop into a colony in a petrie dish, and estimate how large the colony will eventually become. (c) In a cognitive development study, children are given a list of words, and then have to recall them an hour later. The same trial is repeated each day for a month; you are tracking the children's improvement over time and wish to nd the point at which further practice produces only negligible improvement. 2. Suppose you order an 18-inch (diameter) pizza because you have friends coming over, but then your annoying roommate eats 240◦ of the pizza while you were cleaning the bathroom. To impress your friends you decide to compute the area of the pizza that your roommate ate. How much was eaten? 3. (BONUS) Draw the entire unit circle, with angles labeled in either degrees or radians, and coordinates labeled. 1 ...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• 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.

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

• 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.

Dana University of Pennsylvania ‘17, Course Hero Intern

• 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.

Jill Tulane University ‘16, Course Hero Intern