7.
Potassium-42 has a half-life of 12.4 hours. How much of an 848 gram sample of potassium-42 will be left after 62.0 hours?
Answers
The required amount of potassium-42 left after 62.0 hours is 26.5 grams.
Given that,
Potassium-42 has a half-life of 12.4 hours. How much of an 848-gram sample of potassium-42 will be left after 62.0 hours is to be determined.
The half-life of the element is defined as the time span in which the element grows or decays half of its whole composition of growth and decay.
Here,
Amount left of the potassium after 62 hours is given as,
A = 848 [1 / 2 ] ⁶²/¹²°⁴
A = 26.5 gram
Thus, the required amount of potassium-42 left after 62.0 hours is 26.5 grams.
learn more about half-life here:
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Related Questions
A concrete wall is .5 yards wide 5 yards long and 2.5 yards high. Concrete cost 90$ per cubic yard what is the cost of the wall
Answers
Answer:
$562.50
Step-by-step explanation:
1) Find the volume
V = base x width x height = 5 x 0.5 x 2.5 = 6.25 in^3
2) Multiply the nearest whole number x 90
cost = 6 x 90 = $540
3) find the cost of 0.25 in^3
90 : 4 = 22.5
4) find the total cost
540 + 22.5 = $562.50
What is the value of b?
Answers
Answer:
105°
Step-by-step explanation:
since its a straight line then put it equal to 180. First we add and then subtract from 180, like this.
52+23=75
180-75=105
what I do is I just add the two degrees you already have and since we know the long line is 180° you would just subtract 180 and 75 :•)
Hi, please help me with this math problem, I need to submit rly quick, thx.
Answers
Answer:
I think its B.
Step-by-step explanation:
Select the values that make the inequality -n< −4 true. Then write an equalivalent inequality, in terms of nn. (Numbers written in order from least to greatest going across.)
values: -9 -5 -4.1 -4 -3.9 -3 -1 0 1 3 3.9 4 4.1 5 and 9
Answers
Answer:
values that make the inequality true would be any absolute number that is bigger than 4
so that would be n>5
Step-by-step explanation:
Help me for a brianly
Answers
the answer is 11.3
because the circumstance formula of circle is ,
[tex]\pi \: d[/tex]
PLS ANSWER ILL GIVE BRAILIEST IF RIGHT
Answers
Answer:
Its upside down. Cant see what it says
Step-by-step explanation:
Find the volume of the figure to the nearest tenth.
Answers
Answer:
150.8
Step-by-step explanation:
[tex]v = \frac{4}{3} \pi \:{r}^{2} \\ v = \frac{4}{3} \pi \:{6}^{2} \\ v = 150.8[/tex]
Hopefully this'll help you out!
HEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE PLLLLLLLLLLLLLLLLEEEEEEEEEEEEEAAAAAAAAAAAAASSSSSSSSSSSSSSSSEEEEEEEEEEEEEEE
Answers
Answer:
x = 12
Step-by-step explanation:
m<BCF and m<CFE are same-side interior angles.
Same-side interior angles are supplementary. This implies that:
m<CFE + m<BCF = 180°
where,
m<CFE = 11x°
m<BCF = 4x°
Plug in the values
11x + 4x = 180
15x = 180
x = 180/15
x = 12
this is a nice question for 69 points (nice)
What's 34.5 x 2
A. 45
B. nice
C. 78
D. 50
Answers
Answer:
34.5 × 2 = 69
Step-by-step explanation:
pretty self explanatory
Of 220 seventh-grade students, 25% earn the Community Service Award. How many students earn the award?
Answers
Answer:
55 students
Step-by-step explanation:
all you do is 220*.25 and you get the answer
Am I the only one that hates to see the “I can’t find the answers but here’s a link blah blah blah”
JUST GIVE ME THE ANSWER IM LOOKING FOR
Answers
Answer:
I know right! There so annoying!!
I agree because not all of us can access links and it's lazy
NO LINKS PLEASE I NEED REAL ANSWERS
What are the numbers missing on all blanks?
Answers
16/3 x+ 29/3
Please help answer my question i dont know how to solve it.
Answers
x-4y=3
what is equivalent to 100+20
Answers
Answer:
hi
Step-by-step explanation:
100+20 is equal to 120
have a nice day
Answer:
I think what you are looking for is 120
In a grocery store, the total number of cashiers and stockers must be at least 12 but not more than 20. There must be at least 5 cashiers and
at least 3 stockers.
Let x represent the number of cashiers and y represent the number of stockers.
Which system of inequalities can be used to find the number of cashiers and stockers required?
A
(x>5
ly> 3
x + y > 12
x + y > 20
C.
(x>5
y> 3
x + y > 12
(x + y<20
B.
(x 25
y23
x + y s 12
(x + y = 20
D.
(x25
y23
x + y 2 12
(x + y s 20
Answers
PLZ CLICK!! Need help ASAP! I have a time limit.
Answers
Answer:
what's the question for this?
Answer:
33
Step-by-step explanation:
so this is perimeter and area
Explain what the vertical line test is and how it is used.
What is the range of the given function?
{(–2, 0), (–4, –3), (2, –9), (0, 5), (–5, 7)}
{x | x = –5, –4, –2, 0, 2}
{y | y = –9, –3, 0, 5, 7}
{x | x = –9, –5, –4, –3, –2, 0, 2, 5, 7}
{y | y = –9, –5, –4, –3, –2, 0, 2, 5, 7}
Answers
✧ [tex] \underline{ \underline{ \pink{\large{ \tt{E \: X \: P \: L\: A \: N \: A \: T \: I \: O \: N}}}}}: [/tex]
Part 1 :
☃ [tex] \underline{ \large{ \sf{Vertical \: Line \: Test}}} : [/tex] ⇾ All the relations are not functions. We can determine ( identify ) whether a relation is function or not by drawing a vertical line intersecting the graph of the relation. This is called the vertical line test.
If the vertical line intersects the graph of a relation at one point , the relation is a function.If it cuts at more than one point , it is not a function. It means that if there are more points of the graph of a relation of a vertical line , same first component ( pre - image ) has more images ( second component ) which is not the function by definition.( See the attached picture )
In the picture ' 1 ' , The vertical line ( dotted line ) cuts the graph at one point ( P ). Thus the graph represents a function.In the picture ' 2 ' , The vertical line ( dotted line ) cuts the graph at two points P & Q. So, the graph does not represent a function.Part 2 :
☂ The set of all the images of the elements of domain under the function ' f ' is called the range of a function. In other words , the set of second components of a function is called range. We are given the function :
{(–2, 0), (–4, –3), (2, –9), (0, 5), (–5, 7)}The above numbers [ in bold ] are the range of given function. Now, If we arrange these numbers in ascending order, we get ( -9 , -3 , 0 , 5 , 7 ).
Hence , Choice B [ {y | y = –9, –3, 0, 5, 7} ] is correct.
♕ Hope I helped! ♡
☄ Have a wonderful day / night ! ☼
✎ [tex] \underbrace{ \overbrace{ \mathfrak{Carry \: On \: Learning}}}[/tex] ☥
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
Sample Response:
The vertical line test is a way to determine if a relation is a function. This test determines if one input has exactly one output on the graph. If any vertical line passes through more than one point on the graph, then the relation is not a function because two different outputs have the same input.
what is 6+6 pls help :)
Answers
Answer:
its 12 sweety hope this helps
Find the slope of the line that passes through
(8,3) and (3, 4)?
Answers
————-
(X2-X1)
4-3
—— =
3-8
1/-5
(NO LINKS)
Please help this assignment is over due and I don't get it thxx ;)
Answers
Answer:
12.5
Step-by-step explanation:
6 x 12.5 = 75
75 / 6 = 12.5
12.5 is the answer.
Answer:
12.5
Step-by-step explanation:
please answer this question, this is based in circumference, radius and diameter
Answers
Answer:
If the radius of the circle is 7cm . Its area is 154cm square.
Work out the circumference of this circle.
Take it to be 3.142 and give your answer to 1 decimal place.
4 cm
Answers
Answer:
Final Answer 25.12
Step-by-step explanation:
This is very simple you can use two formulas to find the circumfrence of the circle. You can either use C=2πr or C=πd.
For this problem you will be using C=2πr since r is radius and the radius is 4.
C=2*3.14*4
C=6.28*4
C=25.12
Hope this helps.
what is equivalent to
(3x+1)(4x-1)
Answers
3x+4x=7x
1-1=0
So
(3x+1)(4x-1) = 7x
I hope this helped and was right, have a nice day
What is the volume?
help thanks ( :
Answers
Answer:
54 is the volume
Step-by-step explanation:
Multiply 9 * 2 * 3 = 54
Answer:
54
Step-by-step explanation:
...
Find the measure of 43.
43
75
43 = [?]
Answers
Answer:
<3=105°
Step-by-step explanation:
The angle directly to the right of the 75° angle is 105°, as the angles along a straight line add to 180.
<3=105° because they are corresponding angles
Answer:
Solution given:
<3+75=180[co- interior angle]
<3=180°-75°=105°
<3=105°
Please answer all of these for 50 points!!!
Answers
Answer:
Line PQ = Line XY
Line QR = Line YZ
Line RP = Line ZX
Angle P = Angle X
Angle Q = Angle Y
Angle R = Angle Z
Step-by-step explanation:
They're the same shape, just rotated and with different letters.
Solve the inequality |2x - 28] > 32
Answers
Answer:
X>30
Step-by-step explanation:
Well the brackets or parethesis or absolutvalue sign thingy doens’t ,matter. Out of all the signs that won’t do anything at all.
Solve it normally
add 28 on both sides
2x>60
60/2=30
x>30
Answer:
Answer should be...
2x - 28 > 32
ADD BY BOTH SIDES (NON-VARIABLES)
+ 28 + 28
2x > 60
DIVIDE BY VARIABLE NUMBER (2)
2x/2 > 60/2
x > 30
Can someone please help me I will give u brilliant
Answers
Answer:15
Step-by-step explanation:
Answer: The value of the median is 15.
Step-by-step explanation:
How do -1 3/4 and 1 1/4 compare? Chose a symbol to make the statement true?
Answers
Answer:
the answer is <
Step-by-step explanation:
Determine if the sequence An is convergent. If the sequence is convergent, state its limit. If the series diverges, mark the sequence as either Divergent or Divergent because the sequence is unbounded (or -) S13 18 23 28 33 8 5n An 5 8 11 14 17 2 3n Convergent sequence whose limit is O Divergent O Divergent because the sequence is unbounded (or - 00)
Answers
Answer:
The answer is "[tex]\frac{5}{3}[/tex]"
Step-by-step explanation:
[tex]A_n={\frac{13}{5},\frac{18}{8},\frac{23}{11},\frac{28}{14},\frac{33}{17},..................\frac{8+5n}{2+3n}}\\\\[/tex]
[tex]\to A_n=\frac{8+5n}{2+3n}\\\\\to \lim_{n \to \infty} A_n = \lim_{n \to \infty} \ \frac{8+5n}{2+3n}= \lim_{n \to \infty} \ \frac{\frac{8}{n}+5}{\frac{2}{n}+3}=\frac{0+5}{0+3}=\frac{5}{3}[/tex]
In this sequence An is convergents where limits are [tex]\frac{5}{3}[/tex].