N = Noekt Situation:
Find the age of the bird skeleton to the neares
year
A geologist in South America discovers a
bird skeleton that contains 67% of its
original amount of C-14.
Enter the correct answer
DE
No = inital amount of C-14 (at time
t = 0)
N
= amount of C-14 at time t
K = 0.0001
t = time, in years

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

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.