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rusak2 [61]
3 years ago
15

A radioactive substance has a half-life of 10 years.

Mathematics
1 answer:
miss Akunina [59]3 years ago
5 0
Two advanced for my simple mindedness
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I need help plz 10 points
Vaselesa [24]

Answer:

87.9

Step-by-step explanation:

\pi {2}^{2}  \times 2 + 2\pi \times 2 \times 5 = 28\pi = 87.9

5 0
3 years ago
Harriet lives on the ground level of her apartment building. The level she lives on is repersented as by?
sattari [20]

<u>Answer:</u>

zero


<u>Explanation:</u>

<u>In any system:</u>

the ground (base) is referred to as zero lever

what comes above the ground level would be positive

what comes below the ground level would be negative


<u>Now, we are given that:</u>

she lives on the ground floor.


Based on the above, the representation would simply be zero


Hope this helps :)


4 0
4 years ago
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What is the value of y when x = 3. y = 12x
alexandr1967 [171]
We have the equation y = 12x. And we know the value of x. The value of x is 3.
So, if we replace the x variable with the value of x, then we can solve the equation.

y = 12(3)
y = 36

So, the answer is 36.
7 0
4 years ago
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Write the equation Y=mx+b Not just the rate of change
Andreas93 [3]

Answer:

y=2/5x+8/5

Step-by-step explanation:

so say you plot a graph of rain against the hours the gradient would be the rate of change and the information given as your points and the gradient

now to get an equation of a straight line use one of your points eg(1,2) and the gradient or rate of change mine was 0.4

8 0
3 years ago
I need help with a math problem 6838 multiplied by 2830 then that answer divided by 2
Tresset [83]

Answer:

9675770

Step-by-step explanation:

Hope this helps

7 0
3 years ago
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