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Sedaia [141]
3 years ago
13

A 11 gram sample of substance that's used to treat thyroid disorders s has a k-value of 0.1247

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
8 0

Answer:

You don't have a question but I'll answer what I can.

half-life = natural log (.5) / k

half-life =  -.693147 / .1247

half-life = 5.561106656

It seems you did not express the k-value properly.

1) A k-value should have a negative value.

2) A k-value should also have units.

For example, the k-value of tungsten 181 is

-0.005723757 / days

Step-by-step explanation:

You might be interested in
F(x)=2x/3x^2-3 what is the domain of the function?
konstantin123 [22]

Answer:

Step-by-step explanation:

f(x) = \frac{2x}{3x^2 - 3} \\\\ Domain: \\ 3x^2 - 3 ≠ 0 \\ 3x^2 ≠ 3 \\ x^2 ≠ 1 \\ x ≠ \pm 1

D = {x E R/ x ≠ 1 and x ≠ - 1}

I Hope I've helped you.

5 0
3 years ago
The ratio of the lengths of corresponding sides of similar triangles is 3/8. What is the ratio (smaller to larger) of the areas?
svlad2 [7]

Answer:

  9/64

Step-by-step explanation:

For similar triangles, the ratio of areas is the square of the ratio of corresponding sides.

__

The ratio of areas is (3/8)² = 9/64.

4 0
2 years ago
A circle is increased to have a circumference that is 4 times larger than the original. Which of the following options best desc
kogti [31]
Area of a circle is directly proportional to the square of radius of the circle while the circumference is proportional to the radius of the circle. This means that if the radius of a circle is increased x times, then its area will be increased to x^2 times the original area, and the circumference will increase to x times the original circumference.

Thus when the radius is doubled, or in other words if radius mad 2 time the original radius, the area of circle will become 2^2 = 4 time the original area. The circumference will become 2 times the original circumference.

We can calculate exact area and circumference of a circle from its radius using the following equations:

Area of circle = (pi/4)*r^2

Circumference of circle = 2*pi*r

Where r is the radius of the circle.

I know this is a lot, sorry.
3 0
3 years ago
If (14,25) and (9,-10) are two anchor points on a trend line, then find the equation of the line.
posledela

Answer:

y= 7x-73

Step-by-step explanation:

the equation form is y=mx+c where m is the slope and c a constant

m= (25-(-10))/14-9 = 35/5 = 7

so y= 7x+c

replace x and y by 14 and 25 respectively

25 = 7*14+c

c= 25-7*14

c = -73

so y= 7x-73

3 0
3 years ago
Plz help out i am so confused
MatroZZZ [7]

Answer:

Me too not trying to get the points but how are u suppose to solve this anyway

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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