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2 years ago

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the amount of carbon 14 remaining in a sample that originally contained a grams is given by c(t) = a(0.999879)t where t is time

in years. if tests on a fossilized skull reveal that 99.7% of the carbon 14 has decayed, how old, to the nearest 1,000 years, is the skull?

1 answer:

RSB [31]2 years ago

6 0

The awnser is about 300 years old.

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A roll of quarters is shaped like a cylinder and contains 40 each quarter has a thickness of 1.75 and a diameter of 24.26 mm Wha

jarptica [38.1K]

Answer:

D) 32,357mm^3

Step-by-step explanation:

Given

$Quarters = 40$

$Thickness = 1.75mm$

$diameter = 24.26mm$

First, we calculate the volume of 1 roll.

The volume of the cylinder is:

$V = \pi r^2h$

Where

$r = \frac{1}{2} * diameter$

$r = \frac{1}{2} * 24.26mm$

$r = 12.13mm$

And the thickness represents the height.

So:

The volume is:

$V = 3.142 * 12.13^2 * 1.75$

$V = 809.03mm^3$

The volume of the 40 is:

$Roll= 40 * 809.03mm^3$

$Roll=32361.20mm^3$

The closest option is (d):

7 0

2 years ago

Solve this equation with substitution method :-<br> x+5 = 3 (y+5)<br> x-5 = 7 (y-5)

Damm [24]

From the first equation,
x+5 = 3(y+5)
x = 3y + 15 - 5
Now substitue x in the second equation with (3y +15 - 5).
x-5 = 7(y-5)
(3y+15-5) - 5 = 7(y-5)
3y +5 = 7y - 35
-4y = - 40
y = 10

Since y is 10, and x is (3y +15 - 5),
x = 30 + 15 - 5 = 40

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2 years ago

The value of a car is $ 16,000 and depreciating at a rate of 11% per year. Write an

Mandarinka [93]

Answer- 16,000(0.88)t.

6 0

2 years ago

reasoning: if you know that 9 x 20 = 180, how can you use this to find 9 x 24? explain your strategy.

Lostsunrise [7]

9 * 20 = 180

24 has 4 more than that, so multiply 9 to 4 and add it to 180.

9 * 4 = 36

180 + 36 = 216

So 9 * 24 = 216

4 0

2 years ago

Read 2 more answers

Is it correct? Please tell me!

alexandr402 [8]

Yes it is correct.........

4 0

3 years ago

Read 2 more answers