Thursday

August 21, 2014

August 21, 2014

Posted by **Nora** on Monday, October 31, 2011 at 10:45pm.

1970 - 21,168

1980 - 10,584

1990 - 5,292

Assume N is the number of reported cases t years after 1970. Which is a good model for N(t)?

a) 21,168 (2)^t

b) 21,168 (1/2)^t

c) 21,168 (1/2)^t/10

d) 21,168 (2)^t/10

- math -
**Steve**, Tuesday, November 1, 2011 at 11:00amYou need t/10, since the number is halved every 10 years.

Since it's halved, that's (1/2)^(t/10)

So, C

**Related Questions**

Math - The table below gives the educational attainment of the U.S. population ...

Algebra - For 1980 through 1990, the average weekly earnings (in dollars)for ...

Intermediate algebra - The number of trout in America, since 1970, is given by ...

calculus - please help me Asap In 1970, the total enrollment in public ...

Math :) - I need to write a linear function using the following data: Year Life ...

math - calculate the average percent 1970 1980 1990 2000 17.2 17.3 17.1 16.6 do ...

math calculus (please help me) - In 1970, the total enrollment in public ...

Math - The per capita public debt (in thousands of dollars) of the United States...

Algebra 1 - Can someone help me I really don't get this one The table shows the ...

calculus - In 1970, the total enrollment in public universities and colleges in ...