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strojnjashka [21]
3 years ago
13

Bismuth-214 has a half-life (50%) of approximately 20 minutes. Find the amount of Bismuth-214 left

Mathematics
2 answers:
ivolga24 [154]3 years ago
8 0
La verdad no se la respuesta perdón
Greeley [361]3 years ago
3 0

Answer: 3.36

Step-by-step explanation:

f(x)=214(1-.50)^6                       6= amount of times 20 min goes into 2 hrs

f(x)=214(.50)^6

.5^6=.0157

f(x)=214(.0157)

       3.36

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svetlana [45]

Answer:

seventh  interior angle=∠x=29°

Step-by-step explanation:

sum of interior angle of polygon is equal to 360°

let seventh angle of heptagon is x

∠x+47°+55°+62°+64°+54°+49°=360°

∠x=360°-(47°+55°+62°+64°+54°+49°)

∠x=360°-331°=29°

∠x=29°

seventh  interior angle=∠x=29° answer

6 0
3 years ago
Jon and Becky measured the circle-shaped part of a sun they drew on the sidewalk.
PIT_PIT [208]

Answer:  The approximate area of the circle is:  <span>3,629.84 cm² .</span>
______________________________________________________
Area of a circle, "A" :  A = π * r² ;

  in which: A = Area of circle ;
               π <span>≈ 3.14 ; 
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radius of a circle, "r" = d / 2  ;  in which:  "d = diameter" ;

Given "d = 64 cm " ; 
         
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   So;    A = π * r²  ;
 
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            A  ≈  3,629 .84 cm²  .
_____________________________________________
3 0
3 years ago
Sarah bought 96 pencils and 84 erasers to make gift bags for her friends.
Alexeev081 [22]

Answer:

C. 12

Step-by-step explanation:

the greatest common factor between 84 and 96 is 12

3 0
3 years ago
Read 2 more answers
Samantha works at a nursery where she pots plants. It takes her 112 hours to pot 12 plants. Question 1 Part A How many plants ca
PolarNik [594]

Answer:

9

Step-by-step explanation:

112/12= 9.3

3 0
3 years ago
Can someone please help? I am having trouble with this question. Thank you so much.
Nikitich [7]

Answer:

32  =  26

d 2 =  32

Step-by-step explanation: UMU

7 0
3 years ago
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