The half-life of a radioactive kind of neodymium is 11 days. If you start with 2,616 grams of it, how much will be left after 22 days?

Answers

Answer 1

Answer:

654 grams

Step-by-step explanation:

When you set up this equation you want the number of grams you start with, 2616, and the factor by which it is decreasing, which is half, or 1/2. Because the half life is 11 days, but you want to find the amount left over after 22 days, you can make 22/11 as the exponent on the 1/2. The equation should look like this : 2616(1/2)^22/11. With these kinds of equations you always want to multiply the starting value by the factor of increase/decrease, and raise that factor to the time eclipsed divided by the set time(like the 11 day half life).


Related Questions

I've been stuck on this for the past hour. Can someone tell me how to solve it?

Answers

Answer:

The answer is 2.5

Step-by-step explanation:

Your welcome! I sometimes get stuck on problems like you too for hours until I get it.

Answer:

Scale factor: 2.5

Step-by-step explanation:

Scale factor is the ratio between corresponding measurements. And a pre image is basically an (original image) while an image is the translated version of the original.

I'm not sure what the best way to explain my answer is, but you can either multiply or divide to find the answer.

4 x 2.5 = 10

8 x 2.5 = 20

10 x 2.5 = 25

5 x 2.5 = 12.5

10/4 = 2.5

20/8 = 2.5

25/10 = 2.5

12.5/5 = 2.5

What is the range of the relation?
(-3,-2,0,2)
(-3,3)
(-4,-2,1,2)
(-4,-3,-2,1,0,2)

Answers

Answer:

jn8huuojgui

Step-by-s

What (7 1/3) - (2 2/3) = pls help.

Answers

Answer:

4 2/3 is the answer

Step-by-step explanation:

4 2/3 is the answer

Answer:

[tex]4\frac{2}{3}[/tex]

Step-by-step explanation:

Howard deposited some money in the bank. How long will Howard have to leave $5000 in the bank to earn $250 in simple interest at 2%.

Answers

Answer:

t = 2.5 years

Step-by-step explanation:

Given that,

Principal = $5000

Interest = $250

Rate of interest = 2%

We need to find the time. We know that,

[tex]I=\dfrac{PRT}{100}[/tex]

Put all values to find T.

[tex]T=\dfrac{100I}{PR}\\\\T=\dfrac{100\times 250}{5000\times 2}\\\\T=2.5\ yrs[/tex]

So, it will take 2.5 years.

Can anyone help me on this please

Answers

Answer:

b?

Step-by-step explanation:

The answer is B 81x2y2

A builder has an 8-acre plot divided into
1/2
-acre home sites.

How many
1/2
-acre home sites are there?

Answers

Answer:

16

Step-by-step explanation:

8 divided by 1/2 is 16 sites

Hope this helped!

please help me with this math problem, the question is on the picture that i attached, ill mark brainliest if the answer is correct. NO links!

Answers

Answer:

tan ? = oop/adj

tan ? = 14/26

tan ? = 0.538

arctan tan? = arctan 0.538

? = 28°

The largest group in the plant kingdom is :

A.) fungi
B.) nonvascular plants
C.) protist
D.) vascular plants

Answers

Answer:B

Step-by-step explanation:

y varies directly as x, and y = 55 when x = -5.

Answers

Answer:

Step-by-step explanation:

I'm not sure what you are asking here????

Cuando al menos una de cuatro banderas de colores rojo, verde, negro y azul es acomodadas verticalmente con un asta de bandera, el resultado indica una señal (o mensaje). Arreglos diferentes proporcionan señales diferentes a) ¿cuantas señales diferentes son posibles si las cuatro banderas son utilizadas? b) ¿cuantas señales diferentes son posibles si almenos una bandera es utilizada

Answers

Answer:

respuesta b

¿cuantas señales diferentes son posibles si almenos una bandera es utilizada?

4P4+4P3+4P2+4P1=64

Find g[h(x)] and h[g(x)] of the functions g(x)=x^2-7 and h(x)=3x+2

Answers

Answer:

g(h(x)) = 9x² + 12x - 3

h(g(x)) = -3x² - 19

Step-by-step explanation:

g(h(x)) = (3x² + 2)² - 7

= 9x² + 6x + 6x + 4 - 7

= 9x² + 12x - 3

h(g(x)) = 3(x² - 7) + 2

= 3x² - 21 + 2

= 3x² - 19

Doing a quiz please help 30 points for the best answer

Answers

Answer:

(X-7)^2+(y +3)^2 = 7

Simplify: -(14x)0y(-7)z

Answers

-14x*0*-7z

0y=0
-(14x)=-14x

The equation, y=25x, represents the cost, y, in dollars, of x cubic yards of mulch at the garden shop

Answers

Answer:

The cost is $75

Step-by-step explanation:

Given

[tex]y = 25x[/tex]

Required

Cost of 3 cubic yards -- Missing from the question

The required means that: [tex]x = 3[/tex]

Plug in [tex]x = 3\\[/tex] to [tex]y = 25x[/tex]

[tex]y = 25 * 3[/tex]

[tex]y = 75[/tex]

The cost is $75

The price of a train ticket from Orlando to Atlanta is normally $118.00. However, the train company is offering a special 75% discount to children under the age of 16. What is the sale price of a ticket from Orlando to Atlanta for someone under the age of 16?

Answers

Answer:

$88.50

Step-by-step explanation:

118*0.75 = 88.50

Answer:88.50

Step-by-step explanation:

The ratio of boys to girls at a party is 3:2.If there are 60 children at the party, how many girls are there? ​

Answers

Answer:

24girls

Step-by-step explanation:

3+2 =5

5=60children

2=?

24 girls

A card is randomly selected from a standard deck of 52 cards.what is the probability that it is a 10 or a face card?

Answers

Answer:

In a deck of cards, there are 6 faced cards. So, the probability of drawing a faced card is 6 out of 52 cards. Thus, the probability of drawing a face card from a deck of cards is 6/52 = 3/26.

Step-by-step explanation:

Answer:

4/13

Step-by-step explanation:

There are 4 10 cards.

There are 12 face cards.

Probability of both:

4/52 + 12/52 = 16/52 = 4/13

HURRY PLEASE I NEED THIS NOW

Answers

Answer:

72

Step-by-step explanation:

Answer:

72

Step-by-step explanation:

25-7=18

18÷25=0.72×100=72

help fast and thank you please no files

Answers

Answer:

8

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

2x+2.5y = 34

x+y = 15

0.5y = 4

y=8

Four points are labeled on the number line. K L M N + 0.5 0 Which point best represents ? colm ? Point 2 Point M Point K Point N​

Answers

Answer:

point k and point n

K L M N

Step-by-step explanation:

Pleaseee help meeeeee

Answers

Answer:

55 bricks

Step-by-step explanation:

First find the area of one brick by multiplying 10x6x4, which is 240 cm^3. Then divide that from 13,200 which gives you 55 bricks.

Answer:

55 bricks

Step-by-step explanation:

First, we know they used 13,200 cm^3 of concrete. cm^3 is a volume, so in order to find how many bricks can be made, we must find the volume of each brick. Multiply the dimensions of each brick. 10*6*4=240cm^3. Now, divide 13,200cm^3/240cm^3=55 bricks

PLS HELP, also watch out for a person sending links there info grabbing dont open

Convert the rectangular coordinates (−2,2sqr3) to polar form. Let r>0 and 0≤θ<2π.

Enter your answer by filling in the boxes. Enter coordinates as simplifed fractions or radicals in simplest form.

Answers

Answer:

ler we have a point (x, y) and,

in molar form°

Z = √(x² + y² ) and 0 = tan-¹(y/x).

Since the point (2√3, -2) is in the fourth quadrant, make certain that your angle is also in the fourth quadrant.

i need help please think before you answer

Answers

Answer:a^2

Brailniest if this helped ;)

Also the ^ means an exponent just so you know



Which equation best represents c, the total amount Mr. Thomas should be charged
for driving m miles?

Answers

Answer:

c = 0.15m + 45

Step-by-step explanation:

Generally, we have the equation of a straight line as;

y = mx + b

where m is the slope and b is the y-intercept

To get the value of m, we can use the slope equation

m = (y2-y1)/(x2-x1)

Let us select two points to use from the table

we have;

(40,51) and (20,48)

So substituting these values;

m = (48-51)/(20-40) = 0.15

So we have the partially completed equation as;

y = 0.15x + b

To get the value of b, we use any of the points

Using the last, we have

51 = 0.15(40) + b

b = 45

So we have the complete equation as;

y = 0.15x + 45

using the terms in the question, we have;

c = 0.15m + 45

PLEASE CLICK ON THE IMAGE PLEASSSSE HELP MEEEE!!!​

Answers

Answer:

11. 5:6 and 12. 5 to 6

Step-by-step explanation:

in both questions it says to simplify the boys ratio so if you have to simplify they boys then you'll have to find the GCF (Greatest common factor) of both of the number 10 and 12. And the GCF of 10 is 5, and the GCF of 12 is 6 so its 5:6

What is the first step in solving the inequality m-2/6 < -1?
O Multiply both sides by 6.
O Add 2 to both sides.
O Change the direction of the inequality.
O Change the inequality to s.
HELP IM ON A TIMED TEST​

Answers

Step-by-step explanation:

change the directions i think

you have to make the -1 -> 0

you have to multiply by -1

and if you multiply the direction will change

can someone help me with this

Answers

Answer:

29

Step-by-step explanation:

An airport has enough space for 16 planes to park. There are 9 planes parked at the airport right now.

Let x represent how many more planes can park at the airport. Write an inequality that best describes the problem?

Answers

Answer: x=16-9

Step-by-step explanation:

16= total parking space

there are 9 plane already parked

16-9 = how many more plane can park

so the inequality is x=16-9

Answer:

16 ≥ 9 + x

Step-by-step explanation:

Translate this phrase into an algebraic expression 66 decreased by twice Carlos's savings Use the variable c to represent Carlos's savings.​

Answers

49-2v
This is the answer to your question

I WILL GIVE BRAINLIEST!!!

Answers

Answer:

45min

Step-by-step explanation:

just mutiply

Answer:

83min

Step-by-step explanation:

can i have it im trying to get a new role

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