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Dennis_Churaev [7]
2 years ago
13

Element X is a radioactive isotope such that every 27 years, its mass decreases by half. Given that the initial mass of a sample

of Element X is 7900 grams, how much of the element would remain after 12 years, to the nearest whole number?
Mathematics
2 answers:
mafiozo [28]2 years ago
6 0

Answer:e

Step-by-step explanation:

Oksi-84 [34.3K]2 years ago
3 0

Answer:

5805

Step-by-step explanation:

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I need help with this last question.
blondinia [14]

Answer:

Step-by-step explanation:

length=1 m

base of triangle=10 m

height=5m

volume= 1/2×10×5×1=25 m cube.

slant height l=√(5²+5²)=√50=5√2

slant surface area=2[5√2×1]=10√2

area of front and back=2×1/2(10×5)=50

total surface area=50+10√2≈50+14.14≈64.14 m²

8 0
3 years ago
What do you think Thomas Edison meant by the word perspiration? How do those words apply to what you've learned about businesses
EastWind [94]

1. Thomas Edison used "perspiration" to refer to the physical and mental efforts needed to achieve a meaningful purpose in any human endeavor.

2. As it applies to businesses, it is not enough to develop a business idea or plan, as the business person must be prepared to execute and carry the business idea or plan to fruition.

<h3>What does Thomas Edison's reference mean?</h3>

According to Thomas Edison, the superior intellect or creativity we associate with great minds comes from inspiration (the idea) and perspiration (hard work).

Perspiration literarily refers to the sweat that emanates as someone works hard.

Without a strong working ethic, it will be impossible to achieve great results from only the proposition of great ideas or business plans.

Learn more about Thomas Edison at brainly.com/question/26568016

5 0
2 years ago
there are 15 cards numbered 1 through 15 . What is the probability that you choose a 5 or a 9? THANK YOU!!
Katarina [22]
2/15 since there are two cards out of 15


Hope this helped:)


5 0
3 years ago
Does anyone know this one?
erastova [34]
The answer is C, you double 8 million and then double 16 million
4 0
3 years ago
Opal makes $15 per hour working for a photographer. She also coaches a competitive soccer team for $10 per hour.
Jlenok [28]

The system of inequalities that represents the given situation are x + y ≤ 20 and 15x + 10y ≥ 90.

The parameters needed to model the inequalities;

  • amount made by Opal working for a photographer = $15 per hour
  • amount made in the soccer team = $10 per hour
  • minimum amount Opal needs to make a week = $90
  • maximum number of hours Opal needs to work = 20 hours

Let the number of hours Opal works for a photographer = x

Let the number of hours Opal works in soccer team = y

The first system of inequality in the given situation is represented as;

x + y ≤ 20

The second system of inequality in the given situation is represented as;

15x + 10y ≥ 90

Thus, the system of inequalities that represents the given situation are x + y ≤ 20 and 15x + 10y ≥ 90.

learn more here: brainly.com/question/9774970

7 0
2 years ago
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