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xeze [42]
3 years ago
12

The radioactive isotope 14C has a half-life of approximately 5715 years. A piece of ancient charcoal contains only 75% as much o

f the radioactive carbon as a piece of modern charcoal. How long ago was the tree burned to make the ancient charcoal
Mathematics
1 answer:
rusak2 [61]3 years ago
7 0

Answer:

The radioactive isotope 14C has a half-life of approximately 5715 years. A piece of ancient charcoal contains only 75% as much of the radioac

Step-by-step explanation:

ece of modern charcoal. How long ago was the tree burned to make the ancient charcoal

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den301095 [7]

Answer:

-16

Step-by-step explanation:

becjv dfv igcicifcigxixixicocvicicirxc ou9 xexiixi xiexexuwuzwxit

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3 years ago
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Simplify: |3 – 8| - (12 divided by 3 + 1) to the power of 2
Harlamova29_29 [7]

Answer:

-4

Step-by-step explanation:

Assuming that the following equation is correct, begin by solving the operations within parentheses and absolute value expressions.

|3 - 8| - (\frac{12}{3+1} )^2

|-5| - (\frac{12}{4} )^2

The absolute value of -5 is 5; -5 is five units away from 0. 12/4 is equal to 3.

5 - 3^2

5 - 9 = -4

The simplified expression is equal to -4.

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3 years ago
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Dave continues flipping his coin until he has 100 total flips, and the coin shows heads on 47 of those flips. Based on these res
Alenkinab [10]

it is a 50/50 chance of landing on heads or tails

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3 years ago
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1<br>Prove that<br>1: sin/1-cot + cos/1-tan=cos+sin​
Anit [1.1K]

Answer:

have:

\frac{sin}{1-cot}+\frac{cos}{1-tan}\\\\=\frac{sin}{1-\frac{cos}{sin} }+\frac{cos}{1-\frac{sin}{cos} }\\\\=\frac{sin^{2} }{sin-cos}+\frac{cos^{2} }{cos-sin} \\\\=\frac{sin^{2} }{sin-cos}-\frac{cos^{2} }{cos-sin}\\\\=\frac{sin^{2}-cos^{2}  }{sin - cos}\\\\=\frac{(sin-cos)(sin+cos)}{sin-cos}\\\\=sin+cos

Step-by-step explanation:

4 0
3 years ago
Samantha puts an initial $500 into a savings account. The account has a 4% annual compound interest rate. What is the function t
konstantin123 [22]
Hello! I can help you with this!

a. The function that would best represent Samantha's account is f(5) = 500(1 + 0.04)^5. This is because $500 is the principal, the interest rate is 4%, and we're looking for the amount in the savings account 5 years later.

b. Okay. 1 = 0.04 is 1.04. 1.04^5 is 1.216652902. It's a long decimal, but don't delete it. Multiply that decimal by 500 and you get 608.32645 and other numbers behind it or 608 when rounded to the nearest dollar. Samantha will have about $608 in her savings account in 5 years.

Note: The formula goes like this: f(x) = P(1 + r)^x. This means, you add 1 and the simple interest rate in decimal form together and raise that up by the exponent. There is no shortcuts for this, so you'll have to use the calculator. There will be a very long decimal, but don't clear it. Instead, multiply it by the principal to get the answer. It seems very complicating, but if you do this right, it gets easier overtime and you'll make less errors. There are more complex problems out there, so this formula is very important, but it was kept simple for this question.
7 0
3 years ago
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