Answers by Johannes Dorn
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Answers by Johannes Dorn

Answers by Johannes Dorn
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The half-life for U 238 is 4.5x109 years. a) If five half-lives have gone by how many years have gone by? b) If you start with 240 grams of U 238 and end up with 60 grams, how many years have gone by?
answered Jun 3, 2022
7 votes
92.2k views
Décrivez un vieil homme que vous connaisez
answered Mar 21, 2022
4 votes
96.1k views
What is the importance of respiration​
answered Mar 13, 2022
6 votes
2.7k views
Legislative Branch Executive Branch Judicial Branch Who is a part of it? Who is a part of it? Who is a part of it? Qualifications: Qualifications: Qualifications: What do they do? What do they do? What
answered Jan 15, 2022
4 votes
228k views
Hi, guys please be online for the next two weeks as I will have a tough time so I will be asking many doubts in all subjects. Please stay online and help me.
answered Jan 2, 2022
7 votes
114k views
What is the standard form of (7-5i) (2+3i)
answered Nov 18, 2021
2 votes
15.3k views
After she received a free hand-painted Christmas ornament from a religious organization, Mrs. Montevecchi felt obligated to mail a cash donation to the organization. Her response to the free gift best
answered Oct 30, 2021
4 votes
159k views
What did Alexander Hamilton plan in 1783?
answered Sep 13, 2021
2 votes
132k views
The literals in the following statement are Blank 1 and Blank 2. a = 3.14*r*r/2;
answered Jul 28, 2021
5 votes
213k views
The heartworms that can accumulate within the hearts of dogs and other mammals have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally shed. To which phylum does the heartworm
answered May 23, 2021
6 votes
232k views
How were Puerto Ricans viewed in New York in the 1950s?​
answered Apr 10, 2021
5 votes
233k views
Please help me <3 thanks
answered Apr 2, 2021
6 votes
68.4k views
Écrivez la préposition qui convient. Je rêve (blank) acheter une maison en Espagne. Les jeunes qui réussissent (blank)obtenir le Bac sont très contents.
answered Mar 21, 2021
7 votes
14.2k views
A population of protozoa develops with a constant relative growth rate of 0.7944 per member per day. On day zero the population consists of two members. Find the population size after six days
answered Feb 21, 2021
6 votes
137k views
The author uses the phrase killing power to describe the eyes of her secret love. Explain how this phrase helps.The reader understand her crush by the story of judith ortiz cofer first love
answered Jan 29, 2021
4 votes
28.2k views
In March, Delphine's house had 40\%40%40, percent more snowfall than in February. Delphine's house had fff centimeters of snowfall in February. Which of the following expressions could represent how much
answered Nov 6, 2020
3 votes
75.3k views
Use the linear combination method to solve this system of equations. What is the value of x? 3x + 7y = 31 -3x - 2y =-1 A) -6 B) -3 2/3 C) 3 2/3 D) 6
answered Sep 24, 2020
4 votes
128k views
Southern Oil Company produces two grades of gasoline: regular and premium. The profit contributions are $0.30 per gallon for regular gasoline and $0.50 per gallon for premium gasoline. Each gallon of regular
answered Jul 31, 2020
2 votes
1.7k views
A carpenter is making a wooden box which must hold a volume of y cubic inches. The length of its rectangular base will be one inch longer than its width, x. The depth of the chest will be two inches longer
answered Jul 26, 2020
5 votes
54.7k views
Write 3.7 ( there is a line above the 7) as a mixed number.
answered Jun 23, 2020
1 vote
169k views
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