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3 years ago

Answer and show proof for brainliest

Mathematics

2 answers:

Yanka [14]3 years ago

8 0

1. add all value together: 24+31+12+38+12+15= 132

2. divide answer by amount of numbers added together: 132/6=22

3. Answer: the mean is 22

kodGreya [7K]3 years ago

3 0

Answer:

Step-by-step explanation:

Add each number given = 132

132 / 6 (amount of given numbers)

=12

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I need help on this.

mote1985 [20]

Let's go:

7 = x

38 + x = 180

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x = 142°

7 = 142°

I hope I helped you

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4 years ago

Make a ten or a hundred to add mentally 339+123

lianna [129]

9+3=12
30+20=50
300+100=400
Then add.
12+50+400=462
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3 years ago

In 2016, a town had a population of 38,500. With a population growth of 3.4%, what would

maria [59]

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3 years ago

B<br>Find all the missing angles - a,b,c, and d

mart [117]

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3 years ago

Read 2 more answers

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

jok3333 [9.3K]

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.

5 0

3 years ago