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Bess [88]
2 years ago
12

What percentage of the original activity in the sample remains after 17.5 days? half life calculation

Mathematics
1 answer:
Tju [1.3M]2 years ago
8 0

The percentage of the original activity in the sample remains after 17.5 days is obtained as N(t) / No x 100%.

<h3>What is half life?</h3>

Half-life is the time required for a quantity to reduce to half of its initial value.

The original activity in the sample that remains after 17.5 days is calculated from half life equation as shown below;

N(t) = No(¹/₂)^t/h

where;

  • N(t) is the mass of the substance remaining
  • No is the initial mass of the substance
  • t is time elapsed = 17.5 days
  • h is the half life of the substance

percentage of the original activity in the sample remains after 17.5 days;

= N(t) / No x 100%

Thus, the percentage of the original activity in the sample remains after 17.5 days is obtained as N(t) / No x 100%.

Learn more about half life here: brainly.com/question/2320811

#SPJ4

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55.6666666667 as a fraction
vagabundo [1.1K]

Answer: Step-by-step explanation:

What is 5.56666666667 as a fraction?

To write 5.56666666667 as a fraction you have to write 5.56666666667 as numerator and put 1 as the denominator. Now you multiply numerator and denominator by 10 as long as you get in numerator the whole number.

5.56666666667 = 5.56666666667/1 = 55.6666666667/10 = 556.666666667/100 = 5566.66666667/1000 = 55666.6666667/10000 = 556666.666667/100000 = 5566666.66667/1000000 = 55666666.6667/10000000 = 556666666.667/100000000 = 5566666666.67/1000000000 = 55666666666.7/10000000000 = 556666666667/100000000000

And finally we have:

5.56666666667 as a fraction equals 556666666667/100000000000

7 0
3 years ago
1 point
lara [203]

Answer:

V=20 in cubed

Step-by-step explanation:

The formula to find the volume of a pyramid is L×W×H÷3

  1. L×W=15 or 5×3=15
  2. 15×H=60 or 15×4=60
  3. 60÷3=20 in cubed

Therefore V =20 in cubed

Hope that helped! If you have any further questions please message me! Good luck!

8 0
3 years ago
What are the values of m and n
Natasha2012 [34]

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

The required values are ~

  • m = 60 \degree

  • n = 30 \degree

Refer to attachment for solution ~

7 0
2 years ago
Solve for h.<br> h - 6 =<br> =<br> 7
MrRissso [65]

Answer:

<h2><em><u>h = 13</u></em></h2>

Step-by-step explanation:

Solve for h.

h - 6 =  7

h = 7 + 6

h = 13

------------------

check

13 - 6 = 7

7 = 7

the answer is good

6 0
2 years ago
Read 2 more answers
What is the absolute value of -5/9
Finger [1]

Answer:

5/9

Step-by-step explanation:

In short, the absolute value of a number turns that number into a positive value no matter what. Here is a small representation:

Negative -> Positive

Positive -> Positive

Since we are working with a negative value, it will turn positive.

Best of Luck!

8 0
2 years ago
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