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yuradex [85]
2 years ago
11

Element X is a radioactive isotope such that every 13 years, its mass decreases by half. Given that the initial mass of a sample

of Element X is 60 grams, how much of the element would remain after 30 years, to the nearest whole number?
Mathematics
1 answer:
Nana76 [90]2 years ago
8 0

Answer:

2,325 grams !

Step-by-step explanation:

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How do I find the vertex and the standard form? Plz explain
xenn [34]

Answer:

Vertex form

y = -4(x + 3)^2 + 10

Standard form;

y = -4x^2-24x - 26

Step-by-step explanation:

Mathematically, we have the vertex form as

y = a(x-h)^2 + k

(h,k) represents the vertex

We have h as -3 and k as 10

y = a(x+3)^2 + 10

To get a, we substitute any of the points

Let us use (-1,-6)

-6 = a(-1+3)^2 + 10

-6-10 = 4a

4a = -16

a = -16/4

a = -4

So we have the equation as;

y = -4(x+3)^2 + 10

For the standard form;

We expand the vertex form;

y = -4(x + 3)(x + 3) + 10

y = -4(x^2 + 6x + 9) + 10

y = -4x^2 - 24x -36 + 10

y = -4x^2 -24x -26

7 0
2 years ago
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sergey [27]

Answer:

it's 2

Step-by-step explanation:

square root of 8 is 2

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sweet-ann [11.9K]
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It don’t make no sense
Soloha48 [4]
Yes it does not, i want my free points
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A bag contains 12 red marbles The ratio of red marbles to blue marbles is 4:3?
Ostrovityanka [42]

There are 9 blue marbles.

Step-by-step explanation:

12÷4=3

3×3=9

8 0
2 years ago
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