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Elodia [21]
3 years ago
5

Answer 17 and 18 for 15 points​

Mathematics
1 answer:
Mkey [24]3 years ago
5 0

17. 62 degrees

18. 38 degrees

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Element X decays radioactively with a half life of 13 minutes. If there are 530 grams of Element X, how long, to the nearest ten
Leona [35]

Answer:

t \approx 50.4\,min

Step-by-step explanation:

The time constant of the element X is:

\tau = \frac{13\,min}{\ln 2}

\tau = 18.755\,min

The decay function has the following form:

\frac{m}{m_{o}} = e^{-\frac{t}{\tau} }

t = -\tau \cdot \ln \frac{m}{m_{o}}

t = -(13\,min)\cdot \ln \left(\frac{11\,g}{530\,g} \right)

t \approx 50.4\,min

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3 years ago
A home seller wants to net $15,000. If he has agreed to pay a 5% commission, the loan payoff is $94,000 and closing costs are $1
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9514 1404 393

Answer:

  $131,600

Step-by-step explanation:

If the listing price is P, then the net is the difference between that and all of the various costs.

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The minimum listing price must be $131,600.

4 0
3 years ago
-2x+3y=-12 2x+y=4 After adding the two equations to eliminate x you are left with 4y=-8 solve for y
natita [175]

-2x+3y=-12 2x+y=4

add together

4y = -8

divide by 4

y = -2


3 0
3 years ago
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Simplify.12-16/(-4) A.8 B.-1 C.16 D.1
anygoal [31]
We need to follow PEMDAS.

We need to do the division before we can do the subtract (which becomes into addition because of the signs).

12 - 16/-4

12 - (-4)

12 + 4

16


Your final answer is C. 16.
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3 years ago
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