Posted by **Walt** on Tuesday, February 14, 2012 at 5:24pm.

Can you check my work Please?

Let N(t) be the number of bacteria after t days. Then N(t) = Pa^t for some constants P and a. Measurements indicate that N(4) = 5600 and N(8) = 362, 000

1. Write down the formula for N(t) using the rounded values of a and P. (But remember to use the more precise stored values when you use the formula!)

2. Evaluate N(7), N(9), and N(11). (Give answers to the nearest bacterium.)

1. My formula: 86.6(2.84)^t (these are rounded values)

2. (Using non Rounded Values I got the following)

N(7) = 17667 N(9) = 1026452 N(11) = 8252755

- Math -
**Reiny**, Tuesday, February 14, 2012 at 6:51pm
I assume this is a continuation of the question from yesterday.

http://www.jiskha.com/display.cgi?id=1329179895

for N(7) I got 127667 using memory-stored "exact" values of a and P

Your values for N(9) and N(11) are correct

looks like you just had a typo.

- Math -
**Walt**, Tuesday, February 14, 2012 at 10:24pm
Yes, it was from yesterday, sorry if I should've just put this in that post. But thanks a bunch for checking my work.

## Answer This Question

## Related Questions

- Math - Let N(t) be the number of bacteria after t days. Then N(t) = Pa^t for ...
- Math - Can you Check my work please? Let N(t) be the number of bacteria after t ...
- algebra - please help - Let N(t) be number of bacteria after t days. N(t) = Pa^t...
- algebra - exponentials - My question is how do I know that N increases by a ...
- Math - There are 3000 bacteria in a day, if the number of bacteria double per 2 ...
- math - The number of bacteria in a culture is modeled by: n(t) = 1330e^(0.42t) (...
- Math - he number of bacteria in a culture is modeled by n(t)=1710e071t (a) The ...
- math - The number of bacteria in a culture is modeled by n(t)=1710e071t (a) The ...
- calculus - 2. The rate of change in the number of bacteria in a culture is ...
- Calc - The number of bacteria in a culture is increasing according to the law of...

More Related Questions