A 50.0 gram sample decays to 25 grams in 14.4 seconds. What is its half-life?

Answers

Answer 1

Answer:

The half life is 14.4 seconds because the half life is the time it takes for half of a sample to decay.

Hope this helps!


Related Questions

what is the value of x

Answers

Answer:

The value of x is dependant on the value of y.

Step-by-step explanation:

y = (number)x + (another number)

I need a PNG or  picture to give you a factual answer to the value of X.

What the guy above me said is correct

The area of a circle is 100 pi ft2. What is the circumference, in feet? Express your
answer in terms of pi

Answers

Answer:

314 ft²

Step-by-step explanation:

(100 × pi) ft²

100 × 3.14 ft²

314 ft²

6) [1 - (5 – 3)]2+ (5)(-2)
|
this is to the power of

Answers

Answer:

[tex] - 12[/tex]

Step-by-step explanation:

1) Simplify 5 - 3 to 2.

[tex](1 - 2) \times 2 + 5 \times - 2[/tex]

2) Simplify 1 - 2 to -1.

[tex] - 1 \times 2 + 5 \times - 2[/tex]

3) Simplify -1 × 2 to -2.

[tex] - 2 + 5 \times - 2[/tex]

4) Simplify 5 × -2 to -10.

[tex] - 2 - 10[/tex]

5) Simplify.

[tex] - 12[/tex]

Therefor, the answer is -12.

Does anyone know how to solve this?

Answers

Answer:

-13-7=-20

5+4=9

<-20,9>

Step-by-step explanation:

-13+7=6 -4+5=1 (6,1)

Four graphs are shown below:
Graph A
Graph B
Graph C
Graph D
Which graph best shows the line of best fit? (1 point)

Answers

I think it’s a because the lines kinda looks perfect but I might be wrong.

PLZ I NEED HELP
i really need help on this or i will fail!!!

Answers

Answer:

A

Step-by-step explanation:

A

If you have the point (3,5) x = 3 and y = 5
x + 1 = 3 + 1. 3 + 1 = 4
The point (4,5) is one unit to the right of (3,5) so (x+1,y) would move one to the right

HELP PLEASE WILL GIVE BRAINLIST

Answers

Answer:

D

Step-by-step explanation:

TV - $330
Calculate a 20% discount using a proportion or an equation.
LG LED TV
Your price =

Answers

Answer: $264

Steps:
1. Change 20% into a decimal. by moving decimal two places to the left.
.20

2. 330 * .20 = 66
20% of 330 is 66 meaning $66 will be discounted from the tv’s original price.

3. 330 - 66 = 264

330 - original price of tv
20% (.20) - discount
264 - price of tv after discount

Equation used to solve: 330 - (330 * .20)

Find the approximate area of the triangle y x> O 30 square units O 15 square units 21 square units 45 square units​

Answers

Answer:

Step-by-step explanation:

a right triangle is half of a rectangle and the area of a rectangle is

                 area of rectangle = length × width

Area of a triangle is one half times the length times the width

                 area of triangle =  1/2 × length × width

in this case

                length is the number of the y units  

                width is the number of x axis unit      

    area of triangle =  1/2 × length × width  

    area of triangle =  1/2 × (y units) × (x units)       you need to count and insert

                                                                                the number of units into the

                                                                                equation  

area of triangle =  1/2 × (??? y units ) × (??? x units )    do the math yourself

                                                                                       and see if you get one of

                                                                                       answers

Please help a lot of points and Crown.
equivalent to 6a^5/2a^2

3a6/2
3a^6-2
4a^6-2
4a6/2

Answers

I really hope this helped you in some way. sorry I took so long!! Good luck :)

A) chaim used an invalid reason to justify the congruence of a pair of sides or angles.

B) chaim only established some of the necessary conditions for a congruence criterion.

C) chaim established all necessary conditions, but then used an inappropriate congruence criterion.

D) chaim used a criterion that does not guarantee congruence.

Plz help​

Answers

The error Chaim made in his proof is: D. Chaim used a criterion (SSA) that does not guarantee congruence.

What is the Side-side-side Congruence Theorem (SSA)?

The SSA congruence theorem only exist and holds true, only if the congruence non-included angles in both triangles are either obtuse or right angles and have two pairs of congruent sides.

Thus:

The two triangles given have a pair of non-included congruent angles that are less than 90 degrees.

Therefore, the error Chaim made in his proof is: D. Chaim used a criterion (SSA) that does not guarantee congruence.

Learn more about SSA theorem on:

https://brainly.com/question/19258025

PLS HELP IM TIMED!!!

Answers

Answer:

(10,-1)

Step-by-step explanation:

Answer:

10,-1

Step-by-step explanation:

when going right it adds a positive number to the x axis

when going left it adds a negative number to the x axis (same as subtracting)

when going up it adds a positive number to the y axis

when going down it adds a negative number to the y axis (same as subtracting)

Jenny and kelli randomly grab a piece of fruit after track practice, without looking. What is the probolbility rhey both grab an apple

Answers

it would be a 75% chance

15 POINTS!! PLEASE HELP

Answers

Answer:C

Step-by-step explanation:

Answer:

A) 252pi

Step-by-step explanation:

The volume of a sphere is [tex]\frac{4}{3}\pi r^{3}[/tex]

First, let's find the diameter of the large sphere.

If D=12, then R=6

[tex]\frac{4}{3}\pi 6^{3}=288\pi[/tex]

Then, we need to find the volume of the smaller sphere

[tex]\frac{4}{3}\pi 3^{3}=36\pi[/tex]

[tex]288\pi -36\pi =252\pi[/tex]

Hope this helps :)

[tex]-noorati[/tex]

Tan^2/1-tan+cot/1-tan=cot+tan+1 prove that​

Answers

It looks like you have

tan²(x) / (1 - tan(x)) + cot(x) / (1 - tan(x)) = cot(x) + tan(x) + 1

but this is not an identity.

Take for instance x = 3π/4. Then

tan(3π/4) = -1

cot(3π/4) = -1

so that

tan²(x) / (1 - tan(x)) + cot(x) / (1 - tan(x)) = 0

while

cot(x) + tan(x) + 1 = -1

and of course 0 ≠ -1.

Which expression is not equivalent to
3x – 2?

Answers

2x-3 is the correct answer

Answer:

Step-by-step explanation:

What are the options?

What is the length of AC

Answers

Since we don’t know the height of base or angles. We do know it is isosceles triangle.
x+4=3x-8
x-3x= -8-4
-2x= -12 multiply both sides by -1
2x=12
x=12/2
x=6
x+4=6+4=10
3x-8=3•6-8=18-8=10
Base equals x. x=10
AC=10

Jimbo has been putting spare change in a jar for a month. He has collected a total of
117 coins. In one jar he has pennies and in another jar he has quarters. He added them
up and found he had $17.25. How many quarters did he have?

Answers

Answer:

34

Step-by-step explanation:

17.25/2 = 8.62500

8.62500/0.25 = 34 quarter coins,

117 - 34.5 = 83 pennies

Find the value of the marked angles in each of the following ( see image ).

Please show workings.

The only given angle is 126°.

The angle to look for is marked by “))”​

Answers

Answer:

117°

Step-by-step explanation:

The central angle is twice the inscribed angle (same arc).

The inscribed angle forms a supplementary angle with the missing one (opposite angles of the cyclic quadrilateral).

The missing angle is:

180° - 1/2(126°) = 180° - 63° = 117°

3. Share the following quantities in the given
ratios:
(a) $20 in the ratio 1:4.
(b) 150 rubber bands in the ratio 3:7.
(c) 5.76 m in the ratio 7: 2.
(d) 80 millilitres in the ratio 5.3.
(e) $960 in the ratio 3:5:4.


can you help me now ​

Answers

Answer:

i need help please with my maths

Step-by-step explanation:

if your heat beats 75times per minute how many time does it beat in 5 hours​

Answers

Answer:

This is your answer . IfI'm right so,

Please mark me as brainliest. thanks!!!

2/3 feet into inches

Answers

Answer:

12÷3=4

4inches is 2/3 of a foot.

A triangle has sides of lengths 9,7, and 12. Is it a right triangle? Explain.
no: 92 + 7 + 122
O yes: 92 + 72 122
O no: 92 + 7 = 122
yes: 92 + 7 = 122

Answers

Answer: No, it is not a right triangle.

Explanation:
9^2 + 7^2 (?) 12^2

81 + 49 (?) 144

130 = 144

Since 12^2 = 144, and the square root of 130 is 11.4^2, it is not a right triangle.


What is the measure of ZXZY?

Answers

Answer:

measure of angle XZY = 52 degrees

Step-by-step explanation:

The sum of measure of angles of a circle is 360 degrees.

therefore, m(arc XY) = 360 - (110 + 146)

m(arc XY) = 360 - 256

= 104 degrees

angle XZY is an inscribed angle.

By the inscribed angle theorem, the measure of an inscribed angle is half the measure of the intercepted arc.

So, m( angle XZY) = 1/2 * 104

= 52 degrees.

identifica los factores en los siguientes productos de polinomios.

a)5x (x-1)
b) (-2x)(x+10)
c) (x+y)(5x-y)
d) x(x-5)(2x+3)
e)2x(3x+4)(y+1)
f) -y (2y+9)(10-11y)​


ayudaaa porfa necesito las respuestas

Answers

Answer:

a)5xx-5x=5x²-5x

b)-2x(x+10)

c)5x²+4xy-y²

d)2x³-7x²-15x

e)6x²y+6x²+8xy+8x

f)79y²+22y³-90y

Am i correct??????? :::))

Answers

Answer:

i think it would be 6/96 not sure tho

Step-by-step explanation:

Please help as soon as possible

Answers

Answer:

The answer is 17.5

Hope this helps

I’m pretty sure the answer is 17.5

(Hope this helps!!!)

Can I pls have a brainliest?

I’ll mark brainliest

Complete the statment with the best choice
All trapezoids are also
_________________.

a. squares b. parallelogram c. rectangles d. quadrilaterals

Answers

the answer is quadrilaterals. d

Answer:

d  

Step-by-step explanation:

write any two quadratic equations​.

Answers

To find:

Any two quadratic equations​.

Solution:

The general form of a quadratic equation is:

[tex]ax^2+bx+c=0[/tex]

Where, a,b and c are real number and a is non zero.

We know that a,b,c can take any values but a cannot be 0.

For a=1, b=1,c=1, we get

[tex]1x^2+1x+1=0[/tex]

[tex]x^2+x+1=0[/tex]

One quadratic equation is [tex]x^2+x+1=0[/tex].

For a=3,b=-1,c=5, we get

[tex]3x^2+(-1)x+5=0[/tex]

[tex]3x^2-x+5=0[/tex]

Therefore, the two quadratic equations are [tex]x^2+x+1=0[/tex] and [tex]3x^2-x+5=0[/tex].

Use the distributive property to remove the parentheses.
- ( 3y - 2u - 2)
Thank you
the best answer will get brainliest

Answers

I'm not American so I don't know if I translated it right but I think it's

-3y+2u+2

if you just remove the parentheses

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