{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Quizzes/Tests with Solutions for Practice

# Quizzes/Tests with Solutions for Practice - Math 111I Sec...

This preview shows pages 1–2. Sign up to view the full content.

Math 111I Sec 001 Test 3 Solutions Name Directions: Read each question carefully and answer in the space pro- vided. The use of calculators is allowed, but not necessary. There are 100 points possible. To receive partial credit on any problem work must be shown. 1. (10 points) An outbreak of a flu virus begins with 5 people infected and the number of people infected increases by a factor of 2.6 each week. (a) Find a formula that gives the number of people infected, I , as a function of the number of weeks, w , since the outbreak. (b) Use this formula to find the number of people infected after 10 weeks. Solutions. (a) Because the spread of flu is a factor of 2.6 people per week that means that the number of infected grows by a multiple of 2.6 people per week. So we see that the growth factor is 2.6 people per week. So with an initial amount of 5 people we see that the equation for the number of people effected is I ( w ) = 5(2 . 6) w . (b) We want to know the number of people infected after 10 weeks. So we want to know I (10). That is I (10) = 5(2 . 6) 10 = 70583 . 5 2. (5 points) Write the function f ( x ) where f (0) = 490, and for every unit increase in x , then output is multiplied by 1.3. Solutions. This is based on the definitions of exponential functions the answer is f ( x ) = 490(1 . 3) x 3. (15 points) Find the equation for the given functions f ( x ) and g ( x ).

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the 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