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Firdavs [7]
3 years ago
9

Helpppppp l need helppp

Mathematics
1 answer:
Marrrta [24]3 years ago
7 0
With what I think you forgot to add the picture
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Element X is a radioactive isotope such that every 51 years, its mass decreases by half. Given that the initial mass of a sample
pychu [463]

Answer: It will take 6 years for 7500 grams of X to reach 6900 grams.

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

a) for completion of half life:  

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

51=\frac{0.69}{k}

k=\frac{0.69}{51}=0.0135years^{-1}

b) for  7500 g to reach to 6900 g

t=\frac{2.303}{0.0135}\log\frac{7500}{6900}

t=6years

It will take 6 years for 7500 grams of X to reach 6900 grams.

5 0
3 years ago
You have 10 liters of juice that is 40% juice and 60% water. You want the mixture to be 70% juice and 30% water. How many liters
damaskus [11]

Answer:

14 liters

Step-by-step explanation:

10 liters : 4 liters of juice and 6 liters of water

4/10 of juice and 6/10 of water

make it to 70% of juice and 30% of water

add 14 liters of juice

14/20=70% of juice

6/20=30% of water

4 0
4 years ago
The function f(x)-->4-3sinx is defined for the domain 0≤x≤2pi
Alex787 [66]
 <span>1--- f(x) = 4 - 3 sin x = 2 
-3 sin x = -2 
sin x = 2/3 
x ≈ 0.7297276562... ≈ 0.73 

2--- -1 ≤ sin x ≤ 1 
-3 ≤ 3 sin x ≤ 3 
3 ≥ -3 sin x ≥ -3 
7 ≥ 4 - 3 sin x ≥ 1 

If k < 1 or k > 7, there is no solution. 

3--- A = 3π/2 

4--- g(x) = 4 - 3 sin x = y 
4 - 3 sin y = x 
4 - x = 3 sin y 
(4 - x)/3 = sin y 
sin^-1 (4 - x)/3 = y= g^-1 

g^-1 (3) = sin^-1 (4 - 3)/4 = sin^-1 1/4 = 2.8017557... ≈ 2.802

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
</span>
3 0
4 years ago
Ben says he will sell Catalina a ring that he found in his yard. Ben and Catalina look at the ring and decide that they are not
inessss [21]

Answer:

If both parties are over the age of 18, a lawsuit is likely to occur.

Step-by-step explanation:

Ben would likely try and sue Catalina for theft, however she wouldn't be found guilty because of the transfer of property, goods, and or services was entirely legal in this case.

6 0
3 years ago
1. 10(.15)=1.5
Fed [463]

Answer:

6.14125(0.15) = 0.9211875 (below 1)

6.14125 - 0.92118 = 5.22007

Step-by-step explanation:

Given data

1. 10(.15)=1.5

2. 10-1.5=8.5

3. 8.5 (.15)=1.275

4. 8.5-1.275=7.225

continuation the sequence

5)    7.225 (0.15) = 1.08375

6)    7.225 -  1.08375 = 6.14125

7)  <u> 6.14125(0.15) = 0.9211875   (below -one)</u>

8 ) <u> 6.14125 - 0.9211875 = 5.2200625 (get number 5)</u>

9)   5.2200625(0.15) = 0.783009

10) 5.2200625 - 0.783009 = 4.4370532

3 0
3 years ago
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