1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
guajiro [1.7K]
3 years ago
9

Strontium-90 has a half-life of about 29 years. After 65 years, about how many grams of a 25-gram sample will remain?

Mathematics
1 answer:
konstantin123 [22]3 years ago
3 0

Answer:

Ending Amount = Beginning Amount / 2 ^ n

where 'n' = number of half-lives n = 65 / 29 = 2.2413793103

Ending Amount = 25 g / 2^2.2413793103

Ending Amount = 25 / 4.7284892286

Ending Amount = 5.2871009727  g = 5.29 g (rounded)

Step-by-step explanation:

You might be interested in
A taxi driver charges a flat rate of $3.50 plus an additional $1.65 per mile. If Mohammad wants to spend, at most, $60, how far
Elena-2011 [213]

Answer:

11.6 should be your answer!

Step-by-step explanation:

Im so sorry if its wrong!

Hope this helps!!

( > .< )

6 0
3 years ago
A student in a statistics class asks students in a long lunch line about their opinions about the school cafeteria. The sample t
Paladinen [302]

Answer:

The correct option is;

D. Biased

Step-by-step explanation:

A sampling method in which the members of the sample are not representative of the population, such that some members of the population have a higher or lower probability within the sample which is indicative that not all members of the population are sampled

A biased sample is a non random sample and the can lead to misleading data conclusion

In the question, the sampling of student opinion about the school cafeteria among students who are on the lunch line and so prefer the school cafeteria leaves out the portion of the population that get their lunch from alternative sources.

7 0
3 years ago
A school was taking a field trip. The principal wanted 2 teachers for every 45 students. If 270 students will be attending the t
DaniilM [7]

Answer:

The answer is 6.

Step-by-step explanation:

If there are 270 students going on the trip and there would be a teacher for every 45 students you would have to divide.

You would divide 270 ÷ 45 = 6.

6 0
2 years ago
Please help me. I have no idea what to do!!
boyakko [2]

Answer:

It's the first option.

Step-by-step explanation:

It is turned down so the one half is negative (-1/2)

parabola will be in the form of a(x-h)^2 + k. (-h, k) is your vertex, in this case that is (15,25). so in the equation, you will have

-1/2(x-15)^2 + 25. first one.

Hope this helps!

7 0
2 years ago
Hi please help !!! asap
Taya2010 [7]
Ayurveda is the traditional Hindu system of medicine, which is based on the idea of balance in bodily systems and uses diet, herbal treatment, and yogic breathing
7 0
3 years ago
Other questions:
  • Find the area 12 1/2 yd and 17 1/5 yd
    8·1 answer
  • a plastic puzzle in the shape of a triangular prism has bases that are equilateral triangles with side lengths of 4 inches and a
    12·1 answer
  • Cut a rope into 8 equal pieces. each piece was 3/4 long. how long was the original rope​
    14·1 answer
  • The distance between two cities on a map is 3.5 centimeters. The map uses a scale in which 1 centimeter represents 20 kilometers
    10·1 answer
  • Subtract:<br> 6 - 4 =<br> Submit
    11·1 answer
  • You move down 6 units and left 9 units. You end at (-5, -3). Where did you start?
    8·1 answer
  • 3
    6·1 answer
  • The graph shows the ratio of goals attempted to goals made for two soccer players, Andres and Deyvi. Which player has a better r
    8·1 answer
  • A medical center conducted a study to investigate cholesterol levels in people who have had heart
    11·1 answer
  • <img src="https://tex.z-dn.net/?f=%20-%2010a%20-%209n%20%2B%2016%20-%2030%20%2B%203n%20%2B%2015a%20%2B%2050%20%2B%20a%20%3D%20"
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!