165,587 views
40 votes
40 votes
Please show ALL YOUR WORK and how u came to the conclusion.

Please show ALL YOUR WORK and how u came to the conclusion.-example-1
User Hao Ren
by
2.4k points

1 Answer

29 votes
29 votes

Answer:

A

Explanation:

clearly, the equation has to allow t=0, and for that point we need to get 100% (of carbon-14) as result.

and so we also see, that the function calculates the % of the remaining carbon-14.

so, we need the desired outcome 60(%),

because 60 = 100 - 40.

and again, we need a function that shows t=0.

the only answer option fulfilling both criteria is A.

B divides in the exponent by t, so t=0 is not in the domain of the function.

and C and D aim for the wrong remaining percentage.

User Brian Knoblauch
by
3.1k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.