Tuesday

September 30, 2014

September 30, 2014

Posted by **mike** on Monday, March 30, 2009 at 1:16am.

- math -
**Damon**, Monday, March 30, 2009 at 3:35amDo you mean

A(t) = Ao e^-(.0063 t) ????

If so then

1 = 2 e^-(.0063 t)

.5 = e^-(.0063 t)

ln .5 = -(.0063 t)

-.69315 = -(.0063 t)

t = 110.02 days which is about 110 days and one hour

**Answer this Question**

**Related Questions**

Math - A radioactive substance decays according to the formula Q(t) = Q0e−...

Math - A radioactive substance decays according to the formula Q(t) = Q0e−...

Science - Radioactive substance decays so that after t years, the amount ...

Math-Exponential Decay - A lab technician had 58 grams of a radioactive ...

calculus - The rate at which an amount of a radioactive substance decays is ...

Calculus-derivatives - Verify if these are correct answers. 1. The derivative of...

Physics - A radioactive substance decays from 2.0kg to 1.6kg in 156 days. What ...

calculus - Carbon-14 is a radioactive substance produced in the Earth's ...

Math/Calculus - After 5 days, a particular radioactive substance decays to 37% ...

MATH! - The mass of a radioactive substance follows an exponential decay model, ...