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Cerrena [4.2K]
4 years ago
13

Isotope X has a half-life of 8.00 minutes. How much of a 75.0 g sample will remain

Mathematics
1 answer:
Oksana_A [137]4 years ago
6 0

After 8.00 min, 75.0/2 = 37.5 g of the sample remains.

After another 8.00 min (total 16.0 min), 37.5/2 = 18.75 g remains. (Equivalently, 75.0/2^2 g)

After another 8.00 min (total 24.0 min), 18.75/2 = 9.375 g remains. (Or 75.0/2^3 g)

Finally, after another 8.00 min (total 32.0 min), 9.375/2 = 4.6875 g remains (or 75.0/2^4 g), approximately 4.69 g.

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nikdorinn [45]

We know 1000\;mg=1\;g. Therefore, 3000 mg of Zinc is equivalent to

\frac{3000\;mg}{1000} =3000/1000=3\;g.

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4 0
3 years ago
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Find the slope of the line y = -2x +
Dafna1 [17]

Answer:

The slope is -2

Step-by-step explanation:

In any equation that is in the form of this question, the slope is always the number next to x. An example could be y = 6x - 1, the slope would be 6. If we had y = -100x - 5, the slope would be -100.

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Maria makes $8.55 an hour working at the jewelry store. Her paycheck shows that she worked 32.5 hours over the past week. How mu
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1 year ago
What number is 84% of 106?​
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7 0
4 years ago
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.
Nonamiya [84]

The only point outside of the line is (2, 0)

In order to find if a point is outside, inside or on the line, you simply have to put the number into the equation. If the result is both sides are equal, then it is on the line. If the left side is bigger than the right side, then it is outside of the line. If the right side is bigger than the left, then it is inside of the line. So lets plug in and see where (2, 0) falls.

(x - 2)^2 + (y + 3)^2 = 4

(2 - 2)^2 + (0 + 3)^2 = 4

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9 = 4

Since the left side is bigger than the right, we know it is outside of the line.

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4 years ago
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