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
sasho [114]
4 years ago
15

A geologist in South America discovers a bird skeleton that contains 77% of its original amount of C-14.

Mathematics
1 answer:
Ostrovityanka [42]4 years ago
5 0

Answer:

nightowl

N=N0e^-kt

N0 just means the amount of C-14 at time zero (when the bird dies), or the initial number of grams

Step-by-step explanation:

.57*N0 = N0*e^(-0.0001*t)

N0 cancels out

.57 =e^(-0.0001*t)

ln(.57) = -.0001*t

ln(.57) / -.0001=t

t = 5621.189

the bird's skeleton is 5621 years old

Report · 3/1/2016

You might be interested in
Expand and simplify (2x + 5)^2
Vilka [71]

Answer: 4x^2 + 20x + 25

7 0
3 years ago
Read 2 more answers
Are ADB and BDC complementary, supplementary, or neither? Explain.
prisoha [69]

Step-by-step explanation:

Two angles are called supplementary when their measures add up to 180 degrees.

<ADB + <BDC = 180°

IT'S seen that BOTH ADB and BDC are 90 degrees

90+90= 180

5 0
3 years ago
Read 2 more answers
janice wants to jog 3.25 miles on the treadmill. she has jogged 1.63 miles. how much farther does she have to jog to meet her go
stira [4]
She needs to jog 1.62 more miles to meet her goal. 3.25-1.63=1.62
3 0
4 years ago
Read 2 more answers
Need help with these 3
Tamiku [17]

Answer:

1.) x = 110

\frac{3}{22} =\frac{15}{x}

So for 3 to become 15 it would have to be multiplied by 5 because 3 x 5 = 15. And if I multiply the numerator by anything I always have to do the same to the denominator. So I multiply 22 x 5 = x. x = 110

\frac{3 * 5}{22*5} =\frac{15}{110}

2.) x = 72

\frac{x}{16} =\frac{9}{2}

For 16 to become 2 it has to be divided by 8 because 16 ÷ 8 = 2. And I have to do the same to the numerator of course, so i have to find x ÷ 8 = 9. I know the answer by memory, but for some it's easier to rewrite this as 9 × 8 = x. x=72

\frac{72}{16} =\frac{9}{2}

3.) c = 24

\frac{3}{5} =\frac{c}{40}

For 5 to become 40 it must be multiplied by 8 because 5 × 8 = 40. I have to multiply 8 by the numerator as well and 3 × 8 = 24. c = 24

\frac{3*8}{5*8} =\frac{24}{40}

5 0
3 years ago
Read 2 more answers
Antoine and Tess have a disagreement over how to compute a 15% gratuity on $46.00.
asambeis [7]

Answer:

How would Antonio respond....she would say "Thanks for the practice ".

Tess is right about it being easy to find 10% of 46 by moving the decimal point 1 place to the left to get 4.60.....but there is no need to do that twice....because if u do 10% twice, ur doing 20%.

okay....once u get 10% of 46 = 4.60....then u figure 5% of 46 = (0.05(46) = 2.30....because 10% + 5% = 15%.....then u add those together.....4.60 + 2.30 = 6.90. This can easily be checked...15% of 46 = 0.15(46) = 6.9 ,just like 10% of 46 + 5% of 46 = 6.9

5 0
3 years ago
Read 2 more answers
Other questions:
  • Three of the squirrels each got 4 nuts. Five of the squirrels each got 5 nuts. How many nutsdo they have in all
    15·1 answer
  • F(x) =(2x+1)(x^2-3)^4, then f'(x) =?
    8·1 answer
  • Is 80 oz grater than 5 lb?
    13·1 answer
  • Tim has a savings account with the bank. The bank pays him 1% per year. He has $6,400 and wonders when it will reach $6,900. Whe
    13·1 answer
  • How do you use this formula???
    14·2 answers
  • Brian invests £1500 into his bank account. He receives 2% per year simple interest. How much will Brian have after 3 years? Give
    13·1 answer
  • Marina spent 1/5 of her money on a book. If she had $80 left after she brought the book, how much money did she have originally?
    14·2 answers
  • Suppose two rectangles have the same area. Must they have the same length and width? Explain.​
    10·1 answer
  • Help me please<br> Xxxxxxxxx
    7·1 answer
  • What is 5 times 654833
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!