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Arlecino [84]
3 years ago
13

Element X is a radioactive isotope such that every 61 years, its mass decreases by half. Given that the initial mass of a sample

of Element X is 30 grams, how long would it be until the mass of the sample reached 22 grams, to the nearest tenth of a year?
Mathematics
1 answer:
Sever21 [200]3 years ago
7 0

Answer:

27.3

Step-by-step explanation:

y=a(1/2)^t/h

Plug in

22=30(1/2)^t/61

Divide both sides by 30

0.7333333333=(1/2)^t/61

Log both

Log(0.7333333333) / Log(1/2)

0.447458977 = t/61

0.447458977 x 61 = t

27.2949976 to the nearest tenth is 27.3 = t

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5 0
3 years ago
If baby potatoes costs 1.62 and if green beans costs 2.54 and vera bought 2.625 pounds of potatoes and 1.5 pounds of green beans
Svetradugi [14.3K]

Vera's change will be $1.94

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Green beans= 2.54

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The change can be calculated as follows

= 3.81 + 4.25

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= 1.94

Hence the change is $1.94

Read more here

brainly.com/question/2589682?referrer=searchResults

#SPJ1

5 0
2 years ago
(x4- 4x2 + 5x - 1) = (x + 2)<br> Solve using remainder Therom
dimulka [17.4K]

●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●

              Hi my lil bunny!

❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙

Lets do this step by step.

Simplify: (4x2 - 2x) - (-5x2 - 8x).

~~~~~~~~~~~~~~~~~~~~~~~~~

Solution:

(4x2 - 2x) - (-5x2 - 8x)= 4x2 - 2x + 5x2 + 8x.= 4x2 + 5x2 - 2x + 8x.= 9x2 + 6x.= 3x(3x + 2).

~~~~~~~~~~~~~~~~~~~~~~~~

Answer: 3x(3x + 2)

❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙

●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●

Hope this helped you.

Could you maybe give brainliest..?

❀*May*❀

8 0
3 years ago
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