Element X is a radioactive isotope such that every 25 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 50 grams, how much of the element would remain after 23 years, to the nearest whole number?

Answers

Answer 1
50*(.5)^(23/25)=26.43
Answer 2

Answer: 26

Step-by-step explanation:

The correct answer is 26


Related Questions

What is the area of the triangle whose vertices are (-4,0), (-10, 0) and (-7,-6)?

Answers

Step-by-step explanation:

From the point -10 to -4, there is a difference of 6 units. Base = 6

From the x-axis to the furthest point, there is a difference of 6 units. Height = 6

6*6 = 36

36/2 = 18

Area = 18

Mrs. Mobley can jog 3 miles in 27 minutes. How many miles can she jog in 81 minutes?

Answers

Answer:

9 miles

Step-by-step explanation:

You need to get 27 minutes to 81 minutes so you multiply 27 by 3, and that is 81, so you simply multiply 3 by 3 and get 9! Hope this helps! ;)

(27 x 3) = 81

(3 x3) = 9

The population of a town increased from 20,000 people to 25,000 people. What percent did the population increase?​

Answers

Answer:

The town population increase by 25%

Step-by-step explanation:

Btw can u please mark me brainliest, I need 3 more to rank up

Answer: 25%

Step-by-step explanation:

20000*1.25=25000

Could some one help me please

Answers

Answer:

12

Step-by-step explanation:

The answer is 12, because you just had to multiply

 What is the slope of a line that is parallel to the line
y=1/3x-7 ??????

Answers

Answer:

1/3

Step-by-step explanation:

Im pretty sure it’s 12x

Laura wants to learn more about her new high-school. Which of the following is a statistical question Laura could ask.
A. What is the address of the school
B. Who is the principal
C. How old are the students at the school
D. Does the high-school have a jazz band

Answers

Answer:

B. Who is the principal

Step-by-step explanation:

hope it may help

Can someone plz help me with this one problem plzzzzz

I’m Marking Brainliest!!!

Answers

19
23
25
Hope this helps, I’ll give an explanation if you want

Figure 1: Figure 2: Figure 3: Figure 4:​

Answers

figure1- 24° figure2-30° figure3-88° figure4-35°

4x + 6y = -22
y + 3x = 1
Solution

Answers

Answer:

(-7,22)

Step-by-step explanation:

X=-7 and y=22

I need help please and thanks ​

Answers

Answer:

x = 1 y = -3 (1, -3)

Step-by-step explanation:

Use the Substitution Method

First, you have to turn the equations into slope intercept form (y = mx + b)

First equation

x - y = 4

subtract x from both sides

-y = -x + 4

divide each side by -1

y = x - 4

Second Equation

4x + y = 1

subtract 4x from both sides

y = -4x + 1

Turn the two new equations into one equation like so

-4x + 1 = x - 4

add 4x to both sides

1 = 5x - 4

add 4 to both sides

5 = 5x

divide each side by 5

x = 1

Fill in x in one of the original equations in order to find the value of y

4(1) + y = 1

4 + y = 1

subtract 4 from both sides

y = -3

The solution is (1, -3)

hope this helps :)

PLEASE HELP ME WITH THIS
find your answer using the picture provided

Answers

Answer:

d yess i think it is if right mark branly pleasee

Step-by-step explanation:

When the door was left open, 36 pigeons flew the coop. If this was 40 percent of all the pigeons, how many pigeons were there originally?​

Answers

Answer: 90

Step-by-step explanation:

40 % = 0.40. X = number of pigeons. 0.4x =36

X = 36/0.4 = 90

(a) Whats the area of a rectangular field is 3888 m. If the length of the field is 72 m, what is its width?

(b)The perimeter of a rectangular painting is 374 cm. If the width of the painting is 88cm, what is its length?

Answers

Answer:

part a is 54            part b is 99

Step-by-step explanation:

72 x ? =3888

x=54

374 is the perimeter. You have a side that is 88cm so the opposite side will be 88 cm as well. 374-176=198

so between the last 2 sides we have 198. The sides will be equal so you just divide it by 2  

so the top and bottom of the rectangle are 99 and both sides are 88

please help me figure out the volume, it would be a life saverrrrrr! c;

Answers

Step-by-step explanation:

V= L×W×H

V= 8×5×4

V= 160feet cuded

Answer:  80 cubic feet

=================================================

Explanation:

This tent is a triangular prism. We have two congruent triangles in front and back. Let's stand the triangular prism up so that the triangle forms the base, or floor, of this figure.

The area of the base triangle is 5*4/2 = 20/2 = 10 square feet. I used the formula base*height/2 to get the area of a triangle.

Once we know the area of the base of the prism, we multiply that by the height of the prism, which is the 8 ft. So we get 10*8 = 80 cubic feet of volume.

A salesman earns 20% commission on all the merchandise that he sells. Last month he sold $900 worth of merchandise. How much commission (in dollars) did he earn last month?

Answers

Answer: $180

Step-by-step explanation:

Given

Salesman earns 20% commission on merchandise he sells

Last month sales by him are $900

So, his commission out of $900

[tex]\Rightarrow 20\%\ \text{of}\ 900=0.2\times 900\\\Rightarrow \$180[/tex]

So, he grabbed $180 dollar as commissions

6. Aşağıdaki cümlelerin hangisinde “de/da”
bağlacının yazımı ile ilgili bir yanlışlık ya-
pılmıştır?
A. Evde hiç yumurta kalmamış.
B. Nevin de bizimle ders çalıştı.
C. Yolda öğretmenimizi gördük.
D. Pazardan şeftalide alacağım.
4:​

Answers

Answer:

b that is my answer : ) i hope this is correct answer

Charlotte and Riley walked 6/10 of a mile to school one day, and then after school they walked 3/8 of a mile to the store. From the store back home was another 2/5 of a mile. How far did the girls walk in all?

Answers

Answer: The girls walked [tex]1\dfrac38[/tex] miles.

Step-by-step explanation:

Given:  Distance from home to school = [tex]\dfrac{6}{10}[/tex] mile

Distance from school to store = [tex]\dfrac38[/tex] mile

Distance from store to home = [tex]\dfrac25[/tex] miles

Total distance = [tex]\dfrac6{10}+\dfrac38+\dfrac25[/tex]

= [tex]\dfrac{6\times4+3\times5+2\times8}{40}[/tex]   [L.C.M.(10,8,5)=40]

= [tex]\dfrac{24+15+16}{40}[/tex]

= [tex]\dfrac{55}{40}[/tex]

= [tex]\dfrac{11}{8}=1\dfrac38[/tex]  miles

Hence, The girls walked [tex]1\dfrac38[/tex] miles.

if 2x^2 - 5x + 7 is subtracted from 4x^2 + 2x - 11, what is the coefficient of x in the result

Answers

Answer:-3

Step-by-step explanation:

Draw a cone with a height of 9 in. and a diameter of 4 in. Find the volume. Round to the nearest tenth

Answers

Answer:

150.72

Step-by-step explanation: To do this you times the radius by squared then by pi, then fraction your height by the fraction 1/3.

In ΔUVW, the measure of ∠W=90°, the measure of ∠U=13°, and WU = 84 feet. Find the length of UV to the nearest tenth of a foot

Answers

Answer:

Hwww

Step-by-step explanation:

Find the slope of the line that passes through (2, 4) and (9, 9).

Answers

m = 5/7


Have a good day!
The answer is 5/7. Hope this helps!

Malia has $500 to purchase water bottles and pairs of socks for a fundraiser for her school’s cross-country team. She needs to buy a total of at least 200 items without buying too many of just one item. What graph shows the possible numbers of water bottles and pairs of socks that Malia should buy?

Answers

Answer:

graph ??? have u even tried to read the problem

Step-by-step explanation:

Yes I do please took

Circle the errors and explain what the error is.

Answers

Answer:

The error is that should it be x + 10 = 25

3x - 2x = x, not 5x

Hope that helps!

-Sabrina

Step-by-step explanation:

I need help plz plz

Answers

It would be 35 I think unless that a different assignment I did

What is the 18th term in this sequence?
5. 11, 17, 23. ...

Answers

u add 6 to every number each time
5,11,17,23,29,35,41,47,53,59,65,71,78,84,90,96,101,108
108 is the 18th term

plz help for brainliest

Answers

Answer:

B. 0.0000000041

Step-by-step explanation:

Answer: The correct answer is 0.000000004109 which would be answer choice D

Step-by-step explanation:

...................... can yall answer this real quick pleaseee

Answers

Answer:

5.7

Step-by-step explanation:

Answer:

circumference=2πr

18= 2×3.14×r

r= 18/2×3.14

diameter = 5.73cm

Mr. Arnold is buying dry-erase markers for his classroom. He already has 7 markers. Mr. Arnold buys 5 packs with 7 markers each and 8 packs with 4 markers each. He then throws away 2 markers that do not work. Which number sentence best represents how many dry-erase markers Mr. Arnold now has in his classroom?
7 + 5(7) + 8(4) – 2 g

7 + 5(7) + 8(4) – 2 f

7 – 5(7) + 8(4) + 2 e

7 – 5(7) + 8(4) + 2 d

7 – 5(7) + 8(4) – 2 c

7 – 5(7) + 8(4) – 2 b

7 + 5(7) + 8(4) + 2 a

Answers

Answer:

7 + 5(7) + 8(4) – 2 g

Step-by-step explanation:

Where could you put parentheses in 8x-9-12x + 5 to make a new
expression that is still equivalent to the original expression? How do you know
that your new expression is equivalent?

Answers

Answer:

132

Step-by-step explanation:

es ciento treinta y dos

Answer:

you can put them anywhere pretty much as long as you don't  make it multiply

Step-by-step explanation:

you can do :

(8x-9) -12x+5

you cant do:

8x(-9)-12x+5

(27/64) to the power of 2/3

Answers

Step-by-step explanation:

(27/64) to the power of 2/3

(3/4)²

9/16

Hope it helps you

Answer:

9/16

Step-by-step explanation:

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