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

Answer: 26

Step-by-step explanation:


Related Questions

Una torta de queso para 4 personas presisa 300g de queso, 10ml de leche, 100g de azucar, 100g de mantequilla y 50g de harina, si queremos hacer una tarta para 6 personas, qué cantidad de ingredientes necesitaremos?

Answers

Answer:

Por tanto, la cantidad de ingredientes necesarios para 6 personas es:

450 g de queso, 15 ml de leche, 150 g de azúcar, 150 g de mantequilla y 75 g de harina.

Step-by-step explanation:

Por lo tanto:

Para queso

4 personas = 300g de queso

6 personas = x

Cruz multiplicar

4x = 6 × 300g

x = 6 × 300 g / 4

x = 450 g de queso

Por 10ml de leche

4 personas = 10 ml de leche

6 personas = x

Cruz multiplicar

4x = 6 × 10 ml

x = 6 × 10 ml / 4

x = 15 ml

Por 100 g de azúcar

4 personas = 100 g de azúcar

6 personas = x

4x = 6 × 100g

x = 6 × 100 g / 4

x = 150 g de azúcar.

Por 100 g de mantequilla

4 personas = 100 g de mantequilla

6 personas = x

4x = 6 × 100g

x = 6 × 100 g / 4

x = 150 g de mantequilla

Por 50 g de harina

4 personas = 50 g de queso

6 personas = x

4x = 6 × 50g

x = 6 × 50 g / 4

x = 75 g de queso.

Por tanto, la cantidad de ingredientes necesarios para 6 personas es:

450 g de queso, 15 ml de leche, 150 g de azúcar, 150 g de mantequilla y 75 g de harina.

Evaluate y=5x+7, for x=3.

Answers

y=22, you get it be substituting 3 with x and then getting 5•3 which is 15, then add 7

Can someone please help me with this question:3.225 x 8.06=?

Answers

Answer:

25.99350

Step-by-step explanation:

3 . 2 2 5

×     8 . 0 6

1 1 1 3

0 . 1 9 3 5 0

2 1  2 4  

2 5 . 8 0 0 0 0

2 5 . 9 9 3 5 0

Find f(-2), if f(x)=-3x^2-5x+11

Answers

Answer:

f(-2) = 9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

Function Notation

Step-by-step explanation:

Step 1: Define

f(x) = -3x² - 5x + 11

f(-2) is x = -2

Step 2: Evaluate

Substitute in x:                      f(-2) = -3(-2)² - 5(-2) + 11Exponents:                            f(-2) = -3(4) - 5(-2) + 11Multiply:                                 f(-2) = -12 + 10 + 11Add:                                       f(-2) = -2 + 11Add:                                       f(-2) = 9

what is the length of the unknown side​

Answers

Answer: ↓↓↓

Step-by-step explanation:

1. a = ?   b = 16  c = 18

a² + b² = c²

a² + (16)² = (18)²

a² +  256 = 324

     - 256   -256

a² = 68

√a² = √68

a ≈ 8.25

2. a = 4     b = 8     c = ?

a² + b² = c²

(4)² + (8)² = c²

16 + 64 = c²

80 = c²

√c² = √80

c ≈ 8.94

I need help plz and thank u sm

Answers

Answer:

5x + 3

Step-by-step explanation:

Since we can see DC is the median of Triangle ABC

So it breaks the into two equal parts

Given

AD = 2x + 5

BD = 3x - 2

Now

AB = AB + BD

= 2x + 5 + 3x - 2

= 5x + 3

Hope it will help :)❤

i need help quick for this math question

Answers

Answer:

i think option 3

Step-by-step explanation:

im not sure but i think

Answer:

Option 3

Step-by-step explanation:

Hoped I helped like plss

someone help. Simplify: (1/a)^3

Answers

Answer:

1/a3 is the simplify expression for the equation

brain list you
ω please

Answers

Answer:

C

Step-by-step explanation:

Yes it’s CCCCCCCCCCCCC

Alyssa sold half of her comic books and then bought 8 more. She now has
12. How many did she begin with ?

Answers

Answer:

8 Books

Step-by-step explanation:

First find how many she had before buying 8 more-

12 - 8 = 4

Then multiply that by 2

4 x 2 = 8

The had 8 books to begin with

A caterer prepares twice as many pizzas as she usually prepares for a large party. The caterer usually prepares 6 pizzas. The caterer also estimates that each party guest will eat
1
2
of a pizza.

Drag and drop each expression into the correct boxes to complete the explanation.

The expression that represents how many guests the pizzas can serve is .

How many party guests will the pizzas serve? Drag and drop the number of guests into the box.

The pizzas can serve guests.

Answers

Hdhfhfjsgegdgdgdgeghdhfdhdhdgd

Graham spent a total of $15.05 on 10 apples and a packet of strawberries. If a packet of strawberries cost $2.55, how much did each apple cost? 15.05*10 + 2.55

Answers

Answer: $1.25

Step-by-step explanation:

Given

Graham spends a total of $15.05 on 10 apples and a packet of strawberries

Cost of strawberries packet $2.55

Suppose the cost of each apple is x

So, [tex]10x+2.55=15.05[/tex]

On solving

[tex]\Rightarrow10x=15.05-2.55\\\Rightarrow10x=12.5\\\Rightarrowx=\frac{12.5}{10}=\$1.25[/tex]

The cost of each apple is $1.25

What is HL?

HL =

(in the attachment)

Answers

Answer:

try 21

Step-by-step explanation:

if not im as stuck as you are :(

Hi! Okay so I need someone to solve these 2 please! Ty! I will give brainliest!!! :))

Answers

Answer:

Phoebe spent the same as 25% of $80.

Nicholas spent less than $40.

Step-by-step explanation:

Please see the attached pictures for the full solution.

I need help in this

Answers

Answer:

x = 4

Step-by-step explanation:

Since the rectangles are similar, use a ratio.

15/6 = 10/x

or

6/15 = x/10

I will use 15/6 = 10/x to solve this problem, but both ratios should work to solve this problem.

15/6 = 10/x

Cross Multiply:

6(10) = 15x

Solve:

60 = 15x

x = 4

Which is the midpoint of AB with A(-1, 5) and B(6, -3)?

Answers

Answer:

abcdef

Step-by-step explanation:

In order to solve the equation x/8=-3. Step by step please

Answers

Answer:

-24

Step-by-step explanation:

1. Multiply both sides of the equations by 8 to get rid of the 8 in x/8

2. 8 cancels out and we are left with x=-3 x 8

3. -3 times 8 is -24

Bentley spun a spinner with 4 equal sections labeled 1–4. The spinner landed on 1 three times, on 2 four times, on 3 six times, and on 4 three times. For which number is the experimental probability the same as its theoretical probability? Explain.

Answers

Answer:

2

Step-by-step explanation:

Experimental probability : (Number of times event occur / total number of trials)

Total Number of trials = (3 + 4 + 6 + 3) = 16

Experimental probability :

For 1: P(1) :

3/16

For 2 : P(2) :

4/16 = 1/4

For 3: P(3)

6 /16 = 3/8

For 4 : P(4)

3 / 16

Theoretical probability :

The Theoretical probability of 1, 2, 3 and 4 are the same ;

Theoretical probability =

(Required outcome / Total possible outcomes)

For each of 1 - 4

Theoretical probability = 1 /4

Experimental probability of P(2) = 1/ 4 and is Hence, the same as the Theoretical probability

Mr. Selan loves the 99-cent menu at Wendy's (sadly prices went up a few years ago). He used to buy two chicken sandwich at 99-cents each. With a tax of 8.5%, how much would he pay for the two sandwiches? Round your answer to the nearest cent​

Answers

Answer:

Mr. Selan would pay $2.15 for the sandwiches with tax.

Step-by-step explanation:

Given that:

Cost of each sandwich = 99 cents

Cost of two sandwiches = 99*2 = 198 cents

Sales tax = 8.5%

Sales tax = [tex]\frac{8.5}{100}*198=16.8\ cents[/tex]

Sales tax = 17 cents

Total cost = 198 + 17 = 215 cents

Total cost = $2.15

Hence,

Mr. Selan would pay $2.15 for the sandwiches with tax.

OMG PLS GET THIS RIGHT ILL MARK CROWN

Answers

The correct answers are E and C.

PLEASE PLEASE HELP ME I WILL MARK BRAINLIEST

Answers

Answer:

x = -25i

x = 25i

What is the point-slope equation of a line if the slope is 3 and it passes through the point (-9, 2

Answers

Answer:

The point-slope equation of the line is y - 2 = 3(x + 9)

Step-by-step explanation:

The form of the point-slope equation is y - y1 = m(x - x1), where

m is the slope of the line(x1, y1) is a point on the line

∵ The slope of a line is 3

m = 3

∵ The line passes through point (-9, 2)

x1 = -9

y1 = 2

→ Substitute the values of m, x1, and y1 in the point-slope form

y - y1 = m(x - x1)

∴ y - 2 = 3(x - (-9))

→ Remember (-)(-) = (+)

∴ y - 2 = 3(x + 9)

The point-slope equation of the line is y - 2 = 3(x + 9)

Marla's test scores were 93, 81, 77, and 97. What is Marla's test average?

Answers


Her test average was 87%

93 + 81 +77+97 = 348

348/4= 87

Answer:

87

Step-by-step explanation:

Hi!

First you add all of the numbers up together:

77+81+93+97= 348

Next, you divide the answer you got above by how many numbers are in your data set:

348/4 = 87

4 because 77,81,93,97 thats four numbers :)

Therefore, Marla's test average is 87!

So anytime you need find the average of any data set, you just add all the numbers together, then divide by the quantity of numbers there are.

24 birthdays in 100 days. What
percent of days are birthdays?

Answers

Answer:

24%

Step-by-step explanation:

24/100 =.24 which as a percent is 24%

What is the approximate volume of the sphere? Use and round to the nearest whole cubic unit. 42 cubic units 126 cubic units 4187 cubic units 73,385 cubic units

Answers

The question is incomplete, the complete question is;

The radius of the sphere is 10 units.What is the approximate volume of the sphere? Use π = 3.14 and round to the nearest whole cubic unit. cubic units

Answer:

4187 cubic units

Step-by-step explanation:

According to the question;

radius (r) = 10 units

 π = 3.14

Volume of a sphere = 4/3*π*r^3

Substituting values;

V = 4/3*(3.14)*(10)^3

V = 4186.67 cubic units

V = 4187 cubic units (To the nearest whole cubic unit)

Answer:

It's C on Edge

Step-by-step explanation:

6th grade math help me plz

Answers

It’s 64! Hope this helps!!!!

does anyone know how to expand 2 (x + 3)

Answers

Answer:

2(x + 3) = 2x + 6

Step-by-step explanation:

Here, we want to expand

2(x + 3)

To do this, we simply multiply the term outside the bracket with each of the terms inside it

That will be;

(2 * x ) + (2 * 3)

= 2x + 6


Mark and his cousin are playing a game where they pick up colored sticks. Mark currently has 45 points and likes to pick up the orange sticks, earning 5 points every turn. His cousin just lost all his points on the previous turn, and has a strategy to catch up by getting all the white ones, earning 14 points per turn. In a certain number of turns, the score will be tied. How long will that take? How many points will they each have?

Answers

Answer:

they have total 30 point

Word problem:

Sachin’s office is 11.37km away from his house. He covers 9.245km by bus and rest by walking. How much distance does he cover by walking?

(I only need the answer and how to do it ,PLS PLS PLS HELP I REALLY Need It PLS HELP

Answers

Step-by-step explanation:

=2* ( l+b )

=2* ( 11.37+9.245 )

=2* 20.595

=41.19

Solve for x.
A
3x - 6
130°
8x+4

Answers

Answer:

x = 12

A = 30

Step-by-step explanation:

Here, we want to solve for the value of x

The angle at the top of the triangle is 8x + 4

The reason for this is because vertically opposite angles are equal

Mathematically;

8x + 4 + 3x - 6 = 130

The reason for this is that opposite interior angles equal the exterior angle

Thus;

8x + 3x + 4- 6 = 130

11x -2 = 130

11x = 130 + 2

11x = 132

x = 132/11

x = 12

The value of A is 3x - 6

A = 3(12)-6

A = 36-6

A = 30

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