Tutorial
Problem: Try this one on your own.
Find the age of the mummy to the nearest year.
Enter the correct answer.
An arhaeologist, exploring the pyramids
of Africa, discovers a mummy. He finds
that it contains 53 % of original amount
of C-14. Find age of the mummy.
I
DONE
N Noekt
No - initial mass of C-14 (at time t - 0)
N-amount of C-14 at time t
k - 0.0001
t-time, in years
9 OME

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true

first 15 divide by 2 = 7.5

100 divided by 7.5 is 13.

15 / 2 = 7.5

100 / 7.5 = 13.