This could be rephrased as:
You start with 100 grams of a substance. One year later you have 70 grams. What is the half-life?
We need this formula:
half-life = (time * natural log (2)) / natural log (beginning amount / ending amt)
half-life = (1 year * .69315) / natural log (100 / 70)
half-life = (.69315) / 0.35667494396
half-life = 1.9433661145 years
Rounding to nearest year half-life = 2 years
Sourse: https://www.1728.org/halflif2.htm
(See problem 3)
Answer:
Step-by-step explanation:
*Based on the survey which shows 28% of teens regularly watch TV when doing Home work, mathematically, = 0.28 of students watch TV when doing home work
* Suppose there are 379 seventh graders who complete their homework on a particular night.m mathematically, using the data of the survey that 28% of teens (seventh grader) watch TV while doing homework.
Using the survey analysis to compute the number of teens on this night that would be doing homework and also watching TV will be;
0.28* 379 =106.12.
The above computation explains that a possible number of 106 teens would be watching TV and also doing there home work, i.e in more sense 28% of this 379 teens doing homework and watching TV is 106
Answer:
24 pi
Step-by-step explanation:
you basically need to work out the circumeference
circumference=pi times diameter
if the radius is 12, the diameter is 24
so it would be 24 pi
pls mark as brainliest!!!<3
The answer is 2
Hope this helps u. I’m more than welcome to help u!!! :)
