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
Talja [164]
3 years ago
7

Element X decays radioactively with a half life of 11 minutes. If there are 870 grams

Mathematics
1 answer:
exis [7]3 years ago
5 0

Answer:

27.5 minutes

Step-by-step explanation:

Using,

R/R' = 2ᵃ/ᵇ------------------ Equation 1

From the equation,

R = mass of Element X before radioactive decay, R' = mass of element X after radioactive decay, a = Time taken, b = half life.

Given: R = 870 grams, R' = 154 grams, b = 11 minutes.

Substitute these values into equation 1

870/154 = 2ᵃ/¹¹

(870/154)¹¹ = 2ᵃ

Solve for a

2ᵃ = (5.649)¹¹

2ᵃ = 187061.26

Taking the logarithm of both side,

Log2ᵃ = Log(187061.26)

⇒ a = log(187061.26)/log2

a = 8.272/0.301

a = 27.5 minutes

You might be interested in
Help please anyone??
katovenus [111]

Answer:

147

Step-by-step explanation:

Suplementary angles add up to be 180

So 180-33 is 147

3 0
3 years ago
Read 2 more answers
HELP ME PLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS URGENTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT
bazaltina [42]

9514 1404 393

Answer:

  90 m²

Step-by-step explanation:

The given linear dimensions have the ratio ...

  red/blue = (6 m)/(4 m) = 3/2

The ratio of areas is the square of the ratio of the linear dimensions:

  (red area)/(blue area) = (3/2)²

  S = (blue area)(9/4) = (40 m²)(9/4)

  S = 90 m²

5 0
2 years ago
Please help me. I have been struggling with prob and stats.
Paraphin [41]

Answer:

Step-by-step explanation:10

3 0
3 years ago
Pleas please answer correctly !!!!!!!! Will mark brainliest !!!!!!!!!!!!
KiRa [710]

Answer:

10/9

Step-by-step explanation:

average rate of change in 0≤x≤9

=(3-(-7))/(9-0)=10/9

5 0
3 years ago
Read 2 more answers
In a Harris Interactive survey of 2276 adults in the United States, it was found that 33% of those surveyed never travel using c
S_A_V [24]

Answer:

Population: Adults in the United States

Sample: 2276 adults in the United States

33% is a statistic.

Step-by-step explanation:

The population consists of adults in the United States because that is the wider range, and the sample is 2276 of those adults.

The value 33% is an statistic due to the definitions of both words. A statistic is defined as a fact or piece of data obtained from a study of a large quantity of numerical data. While a parameter is a numerical or other measurable factor forming one of a set that defines a system or sets the conditions of its operation.

5 0
3 years ago
Other questions:
  • Damon has five dimes and some nickels in his pocket, worth of a total of $1.20. To find the number of nickels Damon has a, stude
    14·1 answer
  • Help me answer this question
    12·2 answers
  • What kind of angles are angle 1 and angle 2?
    14·1 answer
  • Solve for x in the equation x squared + 2 x + 1 = 17.
    6·1 answer
  • When it rains I get tired. It's raining today. I'm going to take a nap.
    6·1 answer
  • A Food Marketing Institute found that 39% of households spend more than $125 a week on groceries. Assume the population proporti
    9·1 answer
  • How do I find the volume of an L-block?
    5·2 answers
  • I need help ASAP due in 3mins
    9·1 answer
  • During bowling practice, Marley rolled 14 strikes out of 70 attempts.
    9·2 answers
  • Solve log2(x) – log2(3) = 2.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!