Element X decays radioactively with a half life of 6 minutes. If there are 260 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 113 grams

Answers

Answer 1

Answer:

7.2 minutes

Step-by-step explanation:

The formula to find the time using the radioactive decay rate formula is given as:

t = t½ × In(Nt/No)/-In2

Where

t½ = half life = 6 minutes

No = Initial Amount = 260 grams

Nt = Amount after decay

= 113 grams

Hence:

t = 6 × In(113/260)/-In2

t = 7.2131331036796 minutes

Approximately = 7.2 minutes


Related Questions

Alright people..guess the lyrics if u don't get it right your not an arianator :)

"Somethin' 'bout you makes me feel like a dangerous woman"

Answers

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Solve the system of linear equations by using the substitution method. Descibe the process you used and the final answer. {5x+y=152x+y=12

Answers

Answer:

x=1 y=10

Step-by-step explanation:

5x+y=15

2x+y=12

y=12-2x

5x+12-2x=15

3x=3

x=1  

5+y=15

y=10

What is ghe solution to this equation?
02(x - 20) = 44 - x

Answers

X= 40 is the answer to this equation

The given equation can be solved to obtain x = 40.

What is a Linear equation?

A linear equation is a equation that has degree as one.

To find the solution of n unknown quantities n number of equations with n number of variables are required.

The given linear equation can be solved as follows,

0.2(x - 20) = 44 - x

=> 0.2x + x = 44 + 0.2 × 20

=> 1.2x = 48

=> x = 48/1.2

       = 40

Hence, the value of x for the given equation is found to be 40.

To know more about Linear equation click on,

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The first basketball player scored six points in eight minutes the second basketball player scores 10 points in 12 minutes which basketball player scores more points per minute

Answers

The second basketball player scores more because 10/12 is more than 6/8

What is the price per lb of brand X coffee
if 8 lb were mixed with 12 lb of brand Y
coffee which costs $9/Ib to make 20 lb of
Mark's special coffee blend which costs
$13/1b?

Answers

Answer: x = 8/4 = 2

12(2) + 4(6) = 24 + 24 = 48 = 6*8

Step-by-step explanation:

$12X + $6(4) = (X+4)*$8

12X + 24 = 8(x+4)

12x + 24 = 8x + 32

12x + 24 - 8x - 32 = 0

4x - 8 = 0

4x = 8

x = 8/4 = 2

Write the point-slope form of the equation of the line that passes through the points (-3,5) and (-1,4). Include your work
in your final answer. Type your answer in the box provided or use the upload option to submit your solution.

Answers

Answer:

y - 4 = -1/2 (x+1)

Step-by-step explanation:

The point slope form of the equation is expressed as;

y-y0 = m(x-x0)

Get the slope

m = 4-5/-1-(-3)

m = -1/2

Substitute any of the point and m = -1/2 into the expression

y - 4 = -1/2 (x+1)

2(y-4) = -(x+1)

2y-8 = -x-1

2y+x = -1+8

2y+x = 7

Hence the required equation of the line is 2y+x = 7

ANSWER NOW AND U GET !5 and ill answer one of urs

Answers

Dianne saves $20 by purchasing the jeans on sale

Does anybody know what to do when there on punishment for trying to get some water late at night.


I cant wtach tv

Be on my computer/phone/tablet

i cant do anything fun or go to the store

i cant do alot of things

Answers

Answer:

go to bed

Step-by-step explanation:

Answer:

Dam ur parents r strict my dude...

Step-by-step explanation:

draw, make something, build things, walk... i mean there is a lot of things u can do, but it rlly depends on the person...

What number is b?
b +4= 10
A. 5
B. 6
c. 7
D. 10
E.
14.

Answers

Answer:

B

Step-by-step explanation:

B is number 6
10 - 4 = 6
6 + 4 = 10

please help me i really dont know this

Answers

Answer:

Okay, so..if i am thinking correctly you would have to times the numbers the original way that you would multiply anything with... then the remainders im sure that you probably just have to add those in...

(listen i am not so sure about this, i am in 6th grade...but hopefully i helped a little, sorry if i didn't help at all, i rly am... :) )

Step-by-step explanation:

HOPE I HELPED SORRY IF NOT, DON'T COUNT ON MY HELP..

I really am sorry if i didn't help y'all out... :/

<3

Please help ASAP brainliest for correct answer

5.6 litres to nearest 0.5litres

Answers

5.5 or 6 litres.

not sure though, let me know if I’m incorrect lol.

have a good day!

Solve for x: 2x/5=12/8

Answers

Answer:

x = [tex]3\frac{3}{4}[/tex]

Step-by-step explanation:

First, you have to leave 2x by itself on the left side of the equation:

2x = 60/8

Then divide,

x = 15/4

Simplified fraction: x = [tex]3\frac{3}{4}[/tex]

Answer:

exact form: x=15/4

decimal form; 3.75

miced number: 3  3/4

Step-by-step explanation:

Please Answer this question ASAP!

Answers

Answer:

g = 28,000 - 700t

Step-by-step explanation:

How fast is 5,280 feet= 1 mile
in feet per second

Answers

Answer:

10.560

Step-by-step explanation:

you can just use the calculator!

Answer:

62.5 i think... sorry if im wrong

Step-by-step explanation:

i hope this helps :3

Simplify the expression.
0.2(2b - 15c)

Answers

Step-by-step explanation:

=0.2(2b-15c)

=0.4b-3c

hope it helps.

Please answer correctly !!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!

Answers

x+20+16=90

x=54

54+20+16=90

There’s a right angle and it’s marked as 90 degrees.

brainliest for best answer

Answers

Answer:

1/2 and 6/1

i belive you cross multiply

so you would get 12/1

so n=12

hopw i helped

Step-by-step explanation:

Are the two ratios equivitant? Explain your reasoning. The ratios of boys to girls is 5 to 2. The ratio of girls to boys is 2:5​

Answers

Answer:

Yes

Step-by-step explanation:

The order is switched from boys to girls(5 to 2)to girls to boys (2 to 5).

The following is a recipe for Gazpacho, a cold vegetable soup. Write how much of each item in the
recipe you would need to serve 10 people, assuming each would eat one serving.
Gazpacho
Yield: 4 servings
1 ½ lbs of fresh tomatoes
1 c peeled, chopped cucumber
½ c chopped red bell pepper
½ c chopped red onion
1 small jalapeno
1 garlic clove
¼ c olive oil
1 lime, juiced
2 tsp balsamic vinegar
2 tsp Worcestershire sauce
½ tsp cumin
1 tsp salt
¼ tsp black pepper
2 Tsp basil

Answers

9514 1404 393

Answer:

  replace recipe quantities:

  1/4 ⇒ 5/8; 1/2 ⇒ 1 1/4; 1 ⇒ 2 1/2; 1 1/2 ⇒ 3 3/4; 2 ⇒ 5

Step-by-step explanation:

The given recipe serves 4, so must be multiplied by 10/4 = 5/2 to make it make 10 servings.

The numbers in the recipe (ignoring units or ingredients) are ...

  1/4, 1/2, 1, 1 1/2, 2

Each of these numbers needs to be multiplied by 5/2 to get the number for the larger recipe.

  1/4 × 5/2 = 5/8

  1/2 × 5/2 = 5/4 = 1 1/4

  1 × 5/2 = 5/2 = 2 1/2

  (1 1/2) × 5/2 = 3/2 × 5/2 = 15/4 = 3 3/4

  2 × 5/2 = 5

Then, to make the larger recipe, rewrite it with the quantities replaced as follows:

  old value ⇒ new value

  1/4 ⇒ 5/8

  1/2 ⇒ 1 1/4

  1 ⇒ 2 1/2

  1 1/2 ⇒ 3 3/4

  2 ⇒ 5

__

For example, 1 1/2 lbs of fresh tomatoes ⇒ 3 3/4 lbs of fresh tomatoes

_____

Additional comment

If you actually want to create the recipe, you may find it convenient to use a spreadsheet to list quantities, units, and ingredient names. Then you can add a column for the quantities for a different number of servings, and let the spreadsheet figure the new amounts. (A spreadsheet will compute quantities in decimal, so you will need to be familiar with the conversions to fractions--or use metric quantities.)

A cylindrical water tank has a diameter of 5.3 meters and a height of 9 meters. What is the maximum volume that the water tank can hold? Use ϖ to approximate the volume to the nearest hundredth.

Answers

Answer:

198.56[tex]m^{3[/tex]

Step-by-step explanation:

To find the volume of a cylinder, you need to find the area of the cross-section (one of the circles on the side) and multiply it by the length.

Area of the circle = π[tex]r^{2}[/tex] = π x (5.3/2) x (5.3/2) = π x 2.65 x 2.65 = 7.0225π

Volume of the cylinder = 7.0225π x 9 = 63.2025π = 198.56[tex]m^{3[/tex]

If the measures of two angles of a triangle are 102° and 27°, what is the measure of the third angle?
The measure of the third angle isº

Answers

Step-by-step explanation:

therefore the third angle is 51 degrees

An Avon sales lady buys a make-up kit for $120 and sells it for $65 more. What is the percent of markup? 37.5%

Answers

Answer: 54.2%

Step-by-step explanation:

The percent mark-up refers to how much higher you sell a product than what you bought it for expressed as a percentage of what you bought it for.

In this case, the woman bought it for $120 and sold it for $65 more.

Cost = $120

Markup = $65

Markup percentage = 65 / 120 * 100%

= 54.2%

The chemical acidity of a solution is measured in units of pH: pH=-log[H+], where [H+] is the hydrogen ion concentration in the solution. What is [H+] if the pH=8.8?

Answers

Answer:

3.5

Step-by-step explanation:

The chemical acidity of a solution is measured in units of pH: pH=-log[H+], where [H+] is the hydrogen ion concentration in the solution. 1.58 x 10⁻⁹ is [H+] if the pH=8.8.

What do you mean by pH ?

The term pH is defined as the negative logarithm of the [H+] hydrogen ion.

The isolated hydrogen ion, represented by the symbol H+, hence it is used to represent a proton. Because the bare nucleus can readily combine with other particles like electrons, atoms, and molecules, the  hydrogen ion.

The formula for calculating [H+] hydrogen ion is as follows:

pH = - log[H+]

Given pH = 8.8

8.8 = - log[H+]

-8.8 =  log[H+]

Taking Antilogarithm Both side

Antilog of [-8.8] = [H ]

By solving above expression [H+]

= 1.58 x 10⁻⁹

Thus, 1.58 x 10⁻⁹ is [H+] if the pH=8.8.

To learn more about the pH, follow the link;

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Is this table a function?

Yes, because every y is matched with only one x
Yes, because every x is matched with only one y.
No, because the table does not include the point (0, 0)
No, because the table is not proportional.

Answers

Answer:

Yes because every x is matched with only one y

Step-by-step explanation:

A function is an equation where each input has a specific output

A block of silver is weighing 8 ounces is worth $104. What is the unit rate for the Value of silver in one ounce

Answers

Answer:

Blockof silver's wieghing = 8 ounces

total rate = $104

therefore, one ounce=$104/8= $13

If 9(x-9) = -11, then x= ?
A. - 92/9
B. -20/9
C. - 11/9
D. -2/9
E. 70/9

Answers

The answer is x= -11/9

Hlppppppp ehehhehehehehehehhehe

Answers

Answer:

2w +4 = 24

w=10

Step-by-step explanation:

The bold is the number you put in the box, hope that help.

What is 5% of £320? I really need to know

Answers

Answer:

5% of 320 is 16

you multiply 320 by .05 to get 16

Answer: 16

Step-by-step explanation:

Solution for What is 5 percent of 320:

5 percent *320 =

(5:100)*320 =

(5*320):100 =

1600:100 = 16

Now we have: 5 percent of 320 = 16

omg help me asap my lesson is timed!

Answers

Answer:

-27w^9

Step-by-step explanation:

Multiply

-3w^8 × 9w

Step 1:

-3 × 9

= -27

Step 2:

w^8 × w¹

Using the law of indices

w^8 × w¹

= w^(8+1)

= w^9

-3w^8 × 9w

= -27w^9

What is the exponent in the power of 10?

Answers

X^10 the exponent would be 10
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