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Alika [10]
3 years ago
9

Please help. I’ll mark you as brainliest if correct.

Mathematics
1 answer:
OlgaM077 [116]3 years ago
5 0

Answer:

4600

Step-by-step explanation:

it is simply the sum of home credit which is

=3000 + 1600

=4600

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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
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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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Find the value(s) of "k" that will cause the equation 4x^2 +kx + 4 to have one real solution.
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Answer:  k = {8, -8}

<u>Step-by-step explanation:</u>

In order for a quadratic equation to have exactly one solution, the discriminant must equal zero.       →        b² - 4ac = 0

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  ↓       ↓      ↓

a=4    b=k    c=4

b² - 4ac = 0

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