1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna35 [415]
2 years ago
12

Carbon-14 dating assumes that the carbon dioxide on Earth today has the same radioactive content as it did centuries ago. If thi

s is true, the amount of 14C absorbed by a tree that grew several centuries ago should be the same as the amount of 14C absorbed by a tree growing today. A piece of ancient charcoal contains only 38% as much of the radioactive carbon as a piece of modern charcoal. How long ago was the tree burned to make the ancient charcoal? (The half-life of 14C is 5715 years. Round to the nearest year.)
Mathematics
1 answer:
defon2 years ago
7 0

7978 years

Step-by-step explanation:

A = A02^(-t/hl)

where hl = half-life.

Dividing both sides by A0 and taking the logarithm, we get

ln(A/A0) = -(t/hl)ln2

or solving for t,

t= -(hl)ln(A/A0)/ln2

note that A/A0 = 0.38

t = -(5715 yrs)[ln(0.38)/ln2]

= 7978 years

You might be interested in
Please help!! <br><br> What is the value of Avogado's number?
vesna_86 [32]

Answer:

It will be C because I have it in my notes lol

Step-by-step explanation:

Hope this Helped

8 0
3 years ago
25 POINTS ANSWER FAST PLZ!!!!!!!!!!!!!!!!!!!!!!!
Neporo4naja [7]

Volume of a square pyramid when the area of the base is known is area x height/3

Volume = 48 x 8/3 = 128 cubic cm.

8 0
3 years ago
Read 2 more answers
6. In right triangle ABC, mZC=3y-10,
lorasvet [3.4K]

Answer:

scalene

Step-by-step explanation:

step 1

Find the value of y

we know that

The sum of the interior angles in a triangle must be equal to 180 degrees

In this problem

m∠A+m∠B+m∠C=180°

substitute the given values

90\°+(y+40)\°+(3y-10)\°=180\°

Solve for y

4y+120=180

4y=180-120

4y=60

y=15

step 2

<em>Find the measure of angle B</em>

m∠B=(y+40)°

substitute the value of y

m∠B=(15+40)=55°

step 3

<em>Find the measure of angle C</em>

m∠C=(3y-10)°

substitute the value of y

m∠C=(3(15)-10)=35°

The three interior angles are different

so

The three sides of the ABC triangle will also be different

therefore

The right triangle ABC is scalene

6 0
3 years ago
a rectangular box of rice is shown below. what is the greatest amount or rice, in cubic inches, that the box can hold?
Gemiola [76]

Answer:

nbbbbbbb

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
How would u write Subtract 2 from 5 times d​
julsineya [31]

Answer:

5D-2

Step-by-step explanation:

5 times d = 5d. subtract 2 is after the 5d

5 0
3 years ago
Other questions:
  • Simplify the expression 3a + b, when a=1.4 -2x and b=-0.2x + 1.7*
    7·2 answers
  • Simplify to create an equivalent expression.<br> −4(−11+4n)−3(−2n+9)
    8·2 answers
  • Francisco Goya computed the unit price of an 8-count package of hamburger buns and found
    14·1 answer
  • A dealer receives a shipment of x vehicles. In each shipment, 30 of the vehicles are
    14·1 answer
  • Find the value of x if the area of the triangle is 357 in2.
    13·2 answers
  • Can someone help me will mark brainliest!
    13·1 answer
  • A Pizza maker can make 8 pizzas in 12 minutes. What is the Pizza maker's unit rate?
    7·2 answers
  • What is the shape of the base of a pentagonal right prism?
    15·1 answer
  • When it comes to reimbursement packages, company A offers $175 plus
    13·1 answer
  • Find the number if:
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!