Answer:
diamond I think not 100% sure but I looked it up
Answer:
The bones were 12,485 years old at the time they were discovered.
Step-by-step explanation:
Amount of the element:
The amount of the element after t years is given by the following equation, considering the decay rate proportional to the amount present:

In which A(0) is the initial amount and k is the decay rate, as a decimal.
The radioactive element carbon-14 has a half-life of 5750 years.
This means that
, and we use this to find k. So







So

A scientist determined that the bones from a mastodon had lost 77.8 % of their carbon-14. How old were the bones at the time they were discovered?
Had 100 - 77.8 = 22.2% remaining, so this is t for which:

Then






The bones were 12,485 years old at the time they were discovered.
Answer:
162.5 c glue
136.5 c tide
Total: 299 c
Step-by-step explanation:
12.25 x 13 = 162.5
10.5 x 13 = 136.5
162.5+136.5=299
Answer:
Option B,contract job
Step-by-step explanation:
It is likely the number of hours in a work week is 40 hours .
With fifty weeks in year 2020 and 10 ten days of Bank Holidays,the gross annual income from the contract full time employment can be computed thus
gross annual income=$40*40*(53-2)=$81,600
The pay is $40 per hour
In a week 40 hours are worked
There are fifty three weeks in the year minus 10 days of holiday which represents 2 working weeks for a Monday to Friday job
The gross annual income for full time permanent role is $78,000
As a result,the full time contract job pays more
Thank.........you......so.........much.....