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netineya [11]
3 years ago
13

A 30 gram sample of a substance that's used to sterilize surgical instruments has a k-value of 0.1235. Find the substances half

life in days. Round your answer to the nearest tenth.
Mathematics
1 answer:
jok3333 [9.3K]3 years ago
5 0

Answer : The substances half life in days is, 5.6 days.

Step-by-step explanation :

Half life : It is defined as the amount of time taken by a radioactive material to decay to half of its original value.

All radioactive decays follow first order kinetics.

The relation between the half-life and rate constant is:

k=\frac{0.693}{t_{1/2}}

where,

k = rate constant = 0.1235 per days

t_{1/2} = half-life

Now put all the given values in the above formula, we get:

0.1235\text {days}^{-1}=\frac{0.693}{t_{1/2}}

t_{1/2}=5.6\text{ days}

Thus, the substances half life in days is, 5.6 days.

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Bumek [7]

Answer:

A: FG = ½GC

Step-by-step explanation:

Since AD, BC and CD are medians concurrent at G, it means G is the centroid.

Now, when median passes through the centroid, the centroid divides the median in the ratio of 2:1.

Also,that the median touches the side of the triangle at their midpoints.

Thus,by inspection, we can say that;

GD = ⅓AD

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Thus, GC = 2FG and FG = ½GC

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Tbus,looking at the options given and what we have gotten in proof, we can say only FG = ½GC is correct.

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2 years ago
Solve by substitution <br><br> 4x+2y=10<br> x-y=13
Savatey [412]
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3 years ago
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tangare [24]

Answer:

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Answer:

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