Since
, you have
and since
, you have
So,
Note that this assumes that both
and
are positive, or
.
Answer:
Step-by-step explanation:
You wrote the formula incorrectly. It is, correctly:
The k has to be a negative in the formula; if it's not, the time ends up as negative, which will NEVER be the case (unfortunately, time does not go backwards).
If the skeleton contains 67% of the C-14 it contained when the bird was alive, that 67 is our "N". When the bird was alive, it contained 100% of its C-14; so is 100. We know k, e is Euler's number, and we are looking for t.
Begin by dividing both sides by 100 to get
To get that t out from its current exponential position, we take the natural log of both sides. We do this because 1. it's the only way to get an exponent down from that position and 2. because natural logs and e are inverses of each other; natural logs "undo" e's and e's "undo" natural logs.
Again, because e and ln undo each other:
ln(.67) = -.0001t and solve for t. Take the natural log of .67 on your calculator and get
-.4004775666 = -.0001t and
t = 4004.7 years
33/3030x4/3030=132/9180900
9180900-132=9180768
9,180,768 selections will contain no defective calculators. Hope this helps.
Answer:
The total distance David has to travel 20 miles.
The speed limit is 30 mph. He leaves supermarket at 18 10 , he has 50 minutes to get home before 1900.
when traveling within the speed limit he can reach on time because he has to travel only 20 miles which is possible and it won't take him 1 hour according to the 30 mph speed limit.
Answer:
666
Step-by-step explanation: