3 years ago

Set A

Mathematics

1 answer:

Tom [10]3 years ago

5 0

Answer:

I believe C is the correct answer, please let me know if it is wrong

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The ratio of carbon-14 to carbon-12 in a piece of wood discovered in a cave is R = 1/917. Estimate the age of the piece of wood

Colt1911 [192]

Answer:

The answer is " $\bold{6.6 \times 10^{12}\ years}$ "

Step-by-step explanation:

Let the given value is:

$R=\frac{1}{9^{17}}\\\\\to \frac{N_{c_{14}}}{N_{c_{12}}}=\frac{1}{9^{17}}\\\\\to t=\frac{2.303 \times 9^{17}}{5717}=6.6\times 10^{12}\ years$

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scZoUnD [109]

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lubasha [3.4K]

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Read 2 more answers

Consider the rectangular prism below.

Radda [10]

Answer:

Option D

Step-by-step explanation:

Formula for the surface area of rectangular prism = 2(lb + bh + hl)

Here, l = Length of the prism

b = Width

h = Height

If l = 25 cm, b = 12 cm and h = 20 cm

Surface area of the rectangular prism = 2(25×12 + 12×20 + 20×25) cm²

Therefore, Option D will be the correct option.

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4 girls share 38 cookies so that each scholar gets the same amount

GarryVolchara [31]

Answer:

9.5

Step-by-step explanation:

38 / 4 = 9.5

6 0

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