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

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

step-by-step explanation:

i'm pretty sure it would take 20 hours because it's half the men so you multiply the number of hours it takes by 2