A fossilized leaf contains 8% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14.

Answers

Answer 1

Answer:

Step-by-step explanation:

0.5^(t/5600) = 0.08

2^(-t/5600) = 0.08

-t/5600 = log₂0.08

t = -5600 log₂0.08 ≈ 20406 years


Related Questions

*PLEASE ANSWER!!! THANK YOU!!*
John waits on tables and is paid $8.00 an hour. In a 40-hour period, he earned $210.50 in tips. What were his total earnings?

a.) $530.50

b.) $1,684

c.) $520

Answers

Answer:

a.

Step-by-step explanation:

His total earning including tips of 210.50 dollars is a.) $530.50

What is an equation?

An equation is written in the form of variables and constants separated by the operation of multiplication and division,

An equation states that terms in different forms on both sides of the equality sign are equal.

Multiplication and division do not separate the terms of an equation.

Given, John waits on tables and is paid $8.00 an hour. In a 40-hour period,

∴ His earning in those 40 hours is,

= (40×8) dollars.

= 320 dollars.

He also earned 210.50 dollars in tips.

∴ His total earnings is,

= (320 + 210.50) dollars.

= 530.50 dollars.

learn more about equations here :

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A carpenter has wood planks that are 4 yards, 8 yards, 7 yards, and 3 yards long. what is the mad of these measurements

Answers

Answer:

6

Step-by-step explanation:

what you have to do to find that out is add them all togeather the divide that whole by the amount of numbers you were adding so in this case it would be 3 so you would add 8,7, and 3 to get 18 then divide that by 3 to get 6.

hope this helps

pls mark brainliest

8th grade math, please help.

Answers

Answer:

The x = 102

Step-by-step explanation:

The whole angle is 180 so you have to do 180-78 to get the other angle .

Answer:

x = 102

Step-by-step explanation:

x + 78 = 180 {linear Pair}

      x = 180 - 78

     x = 102

Pls help. Free crown to first answer.

Answers

Answer:

Ummm, thanks I guess?

Step-by-step explanation:

SOMEONE ANSWERS THIS ANGLE PLZ !!!!

Answers

Answer: C

Step-by-step explanation:

Answer:

60 degrees

Step-by-step explanation:

a triangle degrees altogether is 180 degrees

80+40=120

so 180-120=60

help i’ll mark brainliest

Answers

Answer:

12

..... ....... ......

What fraction of an hour is 48 minutes

Answers

What fraction of an hour is 48 minutes

Answer:: 0.800

Answer:

4/5

Step-by-step explanation:

Total numbers of minutes in an hour = 60

48/60

4/5 (simplest form)

Which is the right answer

Answers

Answer:

C

Step-by-step explanation:

Considering the length of the triangle, I believe the answer is c.

Jerry and Lino participated in a quiz contest. They scored 46 points altogether. If Jerry scored 18 points, how many points did Lino score?

Write an equation and solve. Let x = Lino's points.

Answers

Answer:

46=18+x

Step-by-step explanation:

x+18=46

-18       -18

   x=28

-2x<10 someone PLEASEE

Answers

Answer:

Step-by-step explanation:

-2x < 10

divide both sides by -2

x > -5

note that the direction of the inequality changes

Please Help Me!! I'll Give Brainliest to the First Person the Answers!!!!

Answers

Answer:

1) 30

2) 13

Step-by-step explanation:

I could be wrong but i counted all of the full squares in the shape

PLS HELP!! GIVING BRAINLIST!!

Fred is 4 times as old as Nathan and is also 27 years older than Nathan.
Let f be Fred's age and let n be Nathan's age.

Which system of equations represents this situation?

Answers

Answer:

f = 4n

f = n+27

Fred is 36 years old and Nathan is 9 years old.

n = 9

Step-by-step explanation:

Answer:

Step-by-step explanation:

Ooh I love these type of problems

Okay, here we go :

f = Fred and n = Nathan

  f = 4n

  f = n + 27

Above are the two equations (the words translated into algebra)

Now you can solve using substitution (any method works, but substitution is easiest for this problem)

4n = n + 27

3n = 27

n = 9

Since n = 9 substitute n into either equation

f = 4 * 9

f = 36

Fred is 36 and Nathan is 9

lol :)

For which points is the x-coordinate less than -1?

Answers

Answer:

Point A

Step-by-step explanation:

Hope it help

Can someone help me with this please and thanks :)

Answers

Y=2x+1 is the correct answer

In 2016, there were about 36 million teenagers (ages 13-17) in the United States. They each sent an average of 850 text messages per month. How many text messages did all of the teenagers in the United States send each month? Express your answer in scientific notation

Answers

Answer:

256

Step-by-step explanation:

A spinner is divided into 12 equal parts. The probability of spinning an x is
How many of the parts are labeled x?
7
9
3
4

Answers

Answer:

3

Step-by-step explanation

3 x 4

Answer:

3

Step-by-step explanation:

I don’t know if it’s true or false

Answers

Answer:

false

Step-by-step explanation:

ur teacher is dum

Which of the following is the correct graph of the linear equation below?
y+2=3(x-1)

Answers

y=3x-5
Slope =3
y-intercept =-5

Abigail's grandmother gave her a square shaped quilt that was made up of 256 small squares. How many squares are on each side of the quilt?​

Answers

Answer:

64

Step-by-step explanation:

you divide 256 four times

Which statement best uses this information to explain why the AA criterion can be used to prove ABC~DBE

Answers

Answer:b

Step-by-step explanation:

Answer: B

Step-by-step explanation:

Correct answers will get brainliest

1. expand and simplify. x(2x + 3) + 5 (x - 7)
2. Solve 5 (3y - 2) = 35
3. Write 0.88 as a fraction in its simplest form

Answers

Step-by-step explanation:

1 i dont know

2.

[tex]5(3y - 2) = 35 \\ = 15y - 10 = 35 \\ = 15y = 35 + 10 = 45 \\y = \frac{45}{15} = 3[/tex]

3.

[tex] \frac{88}{100} = \frac{22}{25} [/tex]

Answer:

Step-by-step explanation:

I hope it could help u and if isn't clear then let me know ..

prime factorisation of 28 and 35​

Answers

GCF of 28 and 35 is 7.

Answer:

Prime factorization of 28 and 35 is (2 × 2 × 7) and (5 × 7) respectively. As visible, 28 and 35 have only one common prime factor i.e. 7.

How do you write 1/2 as a percentage?

Answers

Answer:

lol 50%

Step-by-step explanation:

hope this helps.

Answer:

50%

Step-by-step explanation:

=™=®=™™÷™=™{ k jvj cccchch

30 times 40 equals whatttt

Answers

Answer:

1200 is ur wsener

Step-by-step explanation:

Answer:

1,200 is the result to the problem

Please select a b c or d

Answers

Answer:

a

Step-by-step explanation:

In ΔLMN, ∠L = 55°, ∠M = 85°, find measure of ∠N.​

Answers

Answer:

40 degrees

Step-by-step explanation:

the angles of a triangle add up to 180 degrees,

180 = x + 85 + 55

180 = x + 140

40 = x

Which equation, when solved for x, is equivalent to px-r=w?

Answers

Answer:

The answer is A

Step-by-step explanation:

a walking path BE in a park intersects intersects two sides of the park at their midpoints. You walk from point D to E, E to B, from B to C, and back to point D. How many yards did you walk?

Answers

Answer:

Total distance covered = 436 yards

Step-by-step explanation:

Walking path BE joins the midpoints B and E of the sides AC and AD.

By midsegment theorem,

"Line joining midpoints of two sides of a triangle is parallel and measure half of the third side"

m(BE) = [tex]\frac{1}{2}[m(CD)][/tex]

CD = 2(BE)

CD = 2(74) = 128 yd

From starting point D,

DE = 107 yd

EB = 74 yd

BC = [tex]\frac{254}{2}[/tex]

     = 127 yd

CD = 128 yd

Total walking distance = DE + EB + BC + CD

                                      = 107 + 74 + 127 + 128

                                      = 436 yd

Total distance covered = 436 yards

Answer:

456

Step-by-step explanation:

107

74

254/2 =127

74x2=148

107+74+127+148=456

Write the equation 3x+2y=8 in general form. SHOW YOUR WORK PLEASE

Answers

Answer:

3x+2y-8=0

Step-by-step explanation:

The equation 3x+2y=8 in general form is 3x + 2y - 8 = 0 respectively.

What is a numerical expression?

A numerical expression is an algebraic information stated in the form of numbers and variables that are unknown. Information can is used to generate numerical expressions.

We are given that  the equation 3x+2y=8.

The equation of straight line is written as y = mx + c

3x+2y=8.

2y = 8 - 3x

y = 8/2 - 3/2x

y = 4 - 3x/2

Hence, the general form is 3x + 2y - 8 = 0.

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HELP I NEED THIS FOR MY HOMEWORK

Write each function in standard form.
5. y= 5(x - 2)(x + 1)
6. y=2(x + 6)(x + 3)
7. y=-2(x + 4)(x - 5)
8. y=-4(x + 2)(x + 3)​

Answers

Answer:

5.y=5x-10+5x+1

y=10x-9

6.y=2x+12+2x+6

  y=4x+18

7.y=-2x-8-2x+10

 y=-4x+2

8.y=-4x-8-4x-12

  y=-8x-20

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