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Karo-lina-s [1.5K]
3 years ago
13

What is the decay constant for plutonium 240 if it's half life is 6,300 years ?

Mathematics
1 answer:
IRISSAK [1]3 years ago
4 0
T 1/2 = 0.693/λ. λ= 0.693/Τ1/2 = 0.693/6300 = 1.1x10^-4 yrs^-1.
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Help me plz 8th grade math need answers quick
mixer [17]

Answer:

25. Not a solution

26. Yes a solution

27. y= 2/3 x

28. y=3x+16

Step-by-step explanation:

25. The solution to a linear equation is the point (x,y). To find if an (x,y) is a solution, substitute it into the equation and see if it works.

y=4x-4 and (8,3)

3=4(8)-4

3=32-4

3=28

False

Not a solution.

26. Repeat 25 to solve 26 with y=5x-5 and (0,-5)

y=5x-5 and (0,-5)

-5=5(0)-5

-5=0-5

-5=-5

True

Yes a solution.

27. This line crosses through the origin is proportional and therefore has the form y=mx. It also has a gentle slant meaning that is less than 1/2 and goes in a positive direction. This means it is y=2/3 x.

28. Use inverse operations to rearrange the equation.

y-3x=16

y=16+3x

y=3x+16

8 0
3 years ago
You are building a rectangular dog pen with the length is twice as long as the width. You have 120 feet of fencing what are the
Yakvenalex [24]

Answer:

Dimensions are 20 + 20 + 40 + 40

Step-by-step explanation:

3 0
3 years ago
1. An auto shop has 98 cans of oil at the
Troyanec [42]

Answer:

88 cans were sold, the most important variable is how much you started with and how much you ended with

Step-by-step explanation:

88 cans were sold because 98-10=88, and the most important variable is how much you started and ended with because the question asks how much were sold and you can't know that without knowing the start amount and end amount which is the 2 variables I used to get 88 in the equation (98-10)

The Equation is 98-10=88

5 0
3 years ago
Help plz :((<br> I'll give brainliest
tamaranim1 [39]

For A. the muddy water will slowly begin to decrease because it's been left out in the sun, some of the water will begin to evaporate.

(I don't know about B, or C, but I tried my best on A.)

Make sure to put in your own words. :)

7 0
3 years ago
17/13 = y/10 solve for y and round to the nearest tenth
11Alexandr11 [23.1K]

\frac{17}{13}  =  \frac{y}{10}

17 \times 10 = y \times 13

170 = 13y

y =  \frac{170}{3}  = 56.6666....

56.6666... to the nearest tenth is <u>57</u>.

4 0
3 years ago
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