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RoseWind [281]
3 years ago
15

the half-life of colbalt-60 (used in radiation therapy) is 5.26 years (actual data). How much a of 200 g sample of colbalt-60 wi

ll remain after 26.3 years? Remaining Amount = [ ? ] (1 - [ ] ) ^ [] HELP PLEASE
Mathematics
1 answer:
Oksanka [162]3 years ago
5 0

Answer:

6.25 grams

Step-by-step explanation:

Since we need to find the number of half-lives in 26.3 years, we simply divide 26.3 yrs by 5.26 yrs which yields 5 half-lives. This means that in 26.3 yrs the 200 grams of cobalt-60 will undergo 5 half-lives.

To obtain the remaining amount we simplify the expression;

A = 200*(1-0.5)^(26.3/5.26)

  = 200*(0.5)^(5)

  = 6.25 grams.

Therefore, the amount of a 200 g sample of colbalt-60 that will remain after 26.3 years is 6.25 grams

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Twice a number added to a smaller number is 5. The difference of 5 times the smaller number and the larger number is 3. Let x re
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Answer:

1) 2Y+X=5

2) 5X-Y=3

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3 years ago
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3 years ago
What are the transformations to this quadratic function y= (x+4) power of 2 - 8
I am Lyosha [343]

Answer:

Horizontal shift of 4 units to the left.

Vertical translation of 8 units downward.  

Step-by-step explanation:

Given the quadratic function, y = (x + 4)² - 8, which represents the horizontal and vertical translations of the parent graph, y = x²:

The vertex form of the quadratic function is y = a(x - h)² + k

Where:

The vertex is (h , k), which is either the <u>minimum</u> (upward facing graph) or <u>maximum</u> (downward-facing graph).

The axis of symmetry occurs at <em>x = h</em>.

<em>a</em> =  determines whether the graph opens up or down, and makes the graph wider or narrower.

<em>h</em> = determines how far left or right the parent function is translated.

<em>k</em> = determines how far up or down the parent function is translated.

Going back to your quadratic function,

          y = (x + 4)² - 8

  • The vertex occrs at (-4, -8)
  • a is assumed to have a value of 1.
  • Given the value of <em>h</em> = -4, then it means that the graph shifted horizontally by <u>4 units to the left</u>.  
  • Since k = -8, then it implies that the graph translated vertically at <u>8 units downward</u>.

Please mark my answers as the Brainliest, if you find this helpful :)

4 0
2 years ago
What is the slope of the line that contains the points (-2, 1) and (0, -3)?
spayn [35]

Answer: -2

Step-by-step explanation:

slope = y2 - y1 / x2 - x1

slope = -3 -1 / 0 + 2

slope = -4 / 2

simplify = -2

4 0
3 years ago
Read 2 more answers
Suppose that 3 is a factor of a, a is a divisor of 12, and a is positive. What is the number of possible values of a?
Zina [86]
Answer: the number of possible values of a are 3 and 6

Explanation:
Since a is a divisor of 12
Then let’s see what are the divisor for 12
12= 6 x 2
12= 3 x 4
And we know that 3 is a factor of a
So if a was 3 then 3/3 is exactly 1
And if a was 6 then 6/3 is exactly 2 with no remainder

And 3 and 6 are also the divisor of 12
12/6=2
12/3=4
So a should be 3 and 6

5 0
3 years ago
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