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AlekseyPX
2 years ago
8

A statue of zeus in greece is made of gold and ivory. the ivory was found to have lost 25% of its carbon-14. using the formula f

or carbon-14 dating p=p0e^-0.00012t, determine the age of the statue.
Mathematics
1 answer:
Nonamiya [84]2 years ago
3 0
P/P0 = e^(-0.00012t) = 75% =0.75
-0.00012t = ln(0.75)
t = ln(0.75) / (-0.00012) = 2397 years.
This assumes we know P0 (the original amount of carbon-14 in the ivory) and that the only loss is due to radioactive decay.
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What is the focus of the parabola?<br><br> y=−14x2−2x−2
nataly862011 [7]
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3 years ago
Is there away to place 29 books on the self so each has the same number of books
Zielflug [23.3K]

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3 years ago
A bag contains 39 coins consisting of quarters and nickels the total value of the coins is $6.35 which system of equation can be
MA_775_DIABLO [31]

Answer:

The system of equation to determine the quantity of nickels and quarters is simultaneous equation.

Nickels = 17

Quarters = 22

Step-by-step explanation:

Given

Let n represent number of nickels

Let q represent number of quarters

From line 1 of the question, we understand that

Total coins = 39

So, n + q = 39 because the made up of the nickels and the quarters

It's also stated that the total value of these 39 coins is $6.35.

First, it should be noted that

1 nickel is worth 0.05 and 1 quarter is worth 0.25, we can represent the total value of the coins with the following equation

0.05n + 0.25q = 6.35

At this point, we have two equation such can be solved simultaneously

n + q = 39 ------- (1)

0.05n + 0.25q = 6.35 ------- (2)

So, the system of equation to determine the quantity of nickels and quarters is simultaneous equation.

Solving further.....

Make q the subject of formula in equation (1)

q = 39 - n

Substitute 39 - n for q in equation 2

0.05n + 0.25q = 6.35 becomes

0.05n + 0.25(39 - n) = 6.35

0.05n + 9.75 - 0.25n = 6.35

Collect like terms

0.05n - 0.25n = 6.35 - 9.75

-0.2n = -3.4

Divide through by -0.2

-0.2n/-0.2 = -3.4/-0.2

n = 17

Recall that q = 39 - n

Substituton 17 for n in this equation

q = 39 - 17

q = 22

Hence, there are 17 nickels and 22 coins

7 0
3 years ago
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