Element X is a radioactive isotope such that every 28 years, its mass decreases by
half. Given that the initial mass of a sample of Element X is 70 grams, how long
would it be until the mass of the sample reached 38 grams, to the nearest tenth of a
year?

Answers

Answer 1

Answer:

21

Step-by-step explanation:


Related Questions

How many books recommended by the book reading club would you actually buy? Which book was first recommended to be read by the book club during the summer break? Who wrote a statistical question and why?

Answers

Answer:

7

Step-by-step explanation:

njshhtb jahhhdvjsjjbvgshh shhkakhgsv jjjjgfe

What number could replace t below?
\dfrac{1}{3} = \dfrac{2}{t}
3
1

=
t
2

Answers

Answer:

If you go to this link it'll give you a whole explanation and walk   how to get your answer:

https://www.khanacademy.org/math/arithmetic/fraction-arithmetic/arith-review-visualizing-equiv-frac/a/equivalent-fractions-common-denominator-review

Step-by-step explanation:

Hope that this helps! :)

Have a great rest of your day/night!

8c + c=
I will give brainliest if correct
Thank you

Answers

Answer:

=9c

Step-by-step explanation:

8c+c=9c

hope this is useful

99 times the sum of v and 9

Answers

Answer:

Step-by-step explanation:

99(v + 9) is all you need here.

Is it just me or do you guys get annoyed when people give us a whole explanation like, I only need the letter of the answer.

Answers

Answer:

Yes lol

Step-by-step explanation:

Well the app says it helps people learn the answers but when I'm in a test i just look at letters:)

Answer:

I mean i'm the type to give a long winded answer. But i guess it depends on the context. Sometimes people ask for an explanation yk? Like most of those ppl who ask questions for History and English need a written response.

Each day that a library book is kept past its due date, a $0.30 fee is charged at midnight. Which ordered pair is a viable solution if x represents the number of days that a library book is late and y represents the total fee?

(–3, –0.90)
(–2.5, –0.75)
(4.5, 1.35)
(8, 2.40)

Answers

Answer:

The last option is correct

HEY YOU! YES YOU, HOTTIE PLS HELP ME <3
Which of the following statements is true about the rates of change of the functions shown below?
f(x)=4x
g(x)=4^x

A) For every unit x increases, both f(x) and g(x) quadruple in quantity

B)For every unit x increases, both f(x) and g(x) increases by 4 units.

C) For every unit x increases, f(x) quadruples in quantity and g(x) increases by 4 units.

D) For every unit x increases, f(x) increases by 4 units and g(x) quadruples in quantity.

Answers

Answer:

None of the above if there is that answer because one is 4 times and the other is 4 to the x power which is exponential

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

lol I'll take the hottie bit XDDDD

Help please I need this today

Answers

I’m not the best at math so I won’t even try. But have you used Photomath ?

Answer:

a = 15

t = 5

Step-by-step explanation:

[tex] \frac{12}{a} = \frac{16}{20} \\ \\ 16a = 12 \times 20 \\ \\16 a = 240 \\ \\ a = \frac{240}{16} \\ \\ a = 15 \\ \\ \\ \frac{2}{8} = \frac{t}{20} \\ \\ 8t = 40 \\ \\ t = \frac{40}{8} \\ \\ t = 5[/tex]

PLS HELP ME PLS ACTUALLY PUT AN ANSWER

Answers

Answer:

Hi

Step-by-step explanation:

The answer is B and D.

Hope it's correct.

Couldn’t post the answer here. The answer is in the file. Good luck!

quick.ly/29B1X

I’m just joking. The answer is B. Have a good day.

A window is designed as shown below. Find the value of x

Answers

Answer:

x=20

Step-by-step explanation:

We know that a line is 180 degrees, and the base of the cemi-circle is a line. So,  we would have:

x+7x+x=180

9x=180

x=20

Hope this helps!!

Answer:

x = 20

Step-by-step explanation:

x + 7x + x = 180

9x = 180

x = 20

Find the slope of the line

Answers

Answer:

-5/4 is the slope of the line.

Guided Practice
Find the square.


(c + 1)2


A.
c2 + 1


B.
c2 + c + 1


C.
c2 + 2c + 1

Answers

Answer:

C

Step-by-step explanation:

(c + 1)(c+1) = c² + c + c + 1 = c² + 2c + 1

What is the probability of spinning a number greater than 4?

Answers

Answer:

Please upload the full question.....here the total number of outcomes is not mentioned and hence it can't be solved.

Answer:

Hence, the required probability of getting a number greater than 4, P(E) = 1/3.

Step-by-step explanation:

Carole used 3 3/4cups of butter for baking. The
amount of sugar she used was 1/3 of the amount of
butter she used. How much sugar, in cups, did
she use?
1 1/4cups
1 1/3cups
2 1/2 cups
3 5/12cups

Answers

Answer:

1 1/4 cups

Step-by-step explanation:

3 3/4 cups = 3.75

1/3 = .33333

3.75 x .33333 = 1.25

1.25 = 1 1/4 cups


What is the solution to the equation below?
4x+8 = 2(x - 4)
A x = -5
B x = 6
Cx = -8
D x = -4

Answers

Answer:

C

Step-by-step explanation:

4x +8 = 2x -8

4x = 2x - 16

2x = -16

x = -8

the solution of the equation (x+3)2=7 is

Answers

Answer:

x=1/2

Step-by-step explanation:

The answer is X= 1/2

state a,b, and the y-intercept then graoh the function on a graphing calculator ONLY PROBLEMS 1, 3, 5. WILL MARK BRAINLEST PLEASE HELP MATH ISNT MY STRONG SUBJECT​

Answers

Step-by-step explanation:

y-intercept=when x is 0

So just set 0 for x in all equations

1. 2(3)^x

2(3^0)

2(1)=2

(0,2)

3. -5(.5)^x

-5(.5)^0

-5(1)

-5=y

(0,-5)

6(3)^x

6(3)^0

6(1)=6

(0,6)

Hope that helps :)

help pls and thank uu:)

Answers

-4 is the answer bestie

Answer and Step-by-step explanation:

The answer is 1.

When g(x) is 0, we need to add 4 to both sides, then divide each side by 4 to get the x by itself. We see that x is equal to 1.

0 = 4x - 4

4 = 4x

x = 1

#teamtrees #PAW (Plant And Water)

Find the coordinates of the endpoint of the image?

Answers

Given:

The graph of a line segment.

The line segment AB translated by the following rule:

[tex](x,y)\to (x+4,y-3)[/tex]

To find:

The coordinates of the end points of the line segment A'B'.

Solution:

From the given figure, it is clear that the end points of the line segment AB are A(-2,-3) and B(4,-1).

We have,

[tex](x,y)\to (x+4,y-3)[/tex]

Using this rule, we get

[tex]A(-2,-3)\to A'(-2+4,-3-3)[/tex]

[tex]A(-2,-3)\to A'(2,-6)[/tex]

Similarly,

[tex]B(4,-1)\to B'(4+4,-1-3)[/tex]

[tex]B(4,-1)\to B'(8,-4)[/tex]

Therefore, the endpoint of the line segment A'B' are A'(2,-6) and B'(8,-4).

the same ice cream shop is running a sale on cylindrical shaped tubs of ice cream. The cylinder has a radius of 4.5 cm and a height of 18 cm. Find the volume of a tub of ice cream​

Answers

Answer:

you got this

Step-by-step explanation:

I believe in you

Part A is already answered

Part B asks: What is the length of the hypotenuse?

Answers

Answer:

52

Step-by-step explanation:

Using the Pythagorean theorem

a^2+b^2 = c^2

20^2 + 48^2 = c^2

400 +2304=c^2

2704=c^2

Taking the square root of each side

sqrt(2704) = sqrt(c^2)

52 = c

Answer:

[tex]hypotenuse^{2}[/tex] = [tex]altitude^{2}[/tex] + [tex]base^{2}[/tex]

[tex]hyp^{2}[/tex] = [tex]48^{2}[/tex] + [tex]20^{2}[/tex]

       = 2304 + 400

       = 2704

∴[tex]hyp[/tex] = [tex]\sqrt{2704}[/tex]

       = 52

hope this answer helps you....

16 is what percent of 25

Answers

Answer:

4

Step-by-step explanation:

Answer:

64 %

Step-by-step explanation:

( 16 / 25 ) x 100

= ( 16 x 100 ) / 25

= 16 x 4

= 64 %

Lines need to be painted on the field at a football stadium. The painter estimated that one can of paint would last 11 yards. How many cans of paint will be needed to paint the length of the 100-yard field?



I've been stuck on this question for two days :,) the answers are A.8 B.10 C.12 D.14





Can someone please tell me the answer?

Answers

Answer:  

area = pi*24^2/4 = 452 yd^2

so that means you will need 452/59 = 7.6 (or 8) gallons

THIS IS DUE TODAY Harper rolled a number cube 96 times. Her results are shown in the table. What is the experimental probability of rolling an even number? Simplify if needed.

Answers

Answer:  50/96

Step-by-step explanation:

I assume the table is:

Even numbers are 2, 4, and 6.  The total number of times she rolled an even number is 13 + 17 + 20 = 50.

So the probability is 50/96

Answer quickly pllllllllllsssssss

Answers

D. X>-1


Says I need 20 characters so I’m typing this

2,000(1 + 1)^5
Can you answer my question please

Answers

Answer:

2,000(1 + 1)⁵ = 64000, or in alternate form, 40³

2000(2)^5
2^5=32
32x2000=64000

i really need help. I don't understand​

Answers

The rate of change is 1/4 and the y intercept is -4

function project: a day of fun

Answers

Answer:

Yay fun day :DDDDDD

Step-by-step explanation:

what is the solution to the inequality of x+2<5

Answers

Answer:

Any number below 3

(2, negative infinity)

Answer:

here's the answer with steps

x + 2 < 5

-2 -2

x < 3

Can someone help me with this. Will Mark brainliest. Need answer and explanation/work. Thank you.

Answers

Answer:

tangent x = 12/9

Step-by-step explanation:

Hello There!

Once again these are the Trigonometric Ratios

SOH CAH TOA

Sine = Opposite over Hypotenuse (SOH)

Cosine = Adjacent over Hypotenuse (CAH)

Tan = Opposite over Adjacent (TOA)

And for this one we are asked to find the tangent of angle x

Remember tangent = opposite over adjacent

opposite - the side length that is opposite of the angle (so the angle will be facing that side length)

adjacent - the side length that is not the opposite nor the hypotenuse

The opposite of angle x is 12 and the adjacent of angle x is 9

so tangent x = 12/9

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