Element X decays radioactively with a half life of 9 minutes. If there are 760 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 19 grams?

Answers

Answer 1

Answer:

Step-by-step explanation:

760·0.5^(t/9) = 19

0.5^(t/9) = 19/760

2^(-t/9) = 0.025

-t/9 = log₂(0.025)

t = -9log₂(0.025) = 47.9 minutes

Answer 2

Answer:

47.9 minutes

Step-by-step explanation:


Related Questions


The salaries of 4 players on a professional basketball
team average $200,000 per year. If a fifth player is hired
for $400,000 per year, what will be the average salary
for the 5 players?

Answers

If salary average of 4 players is making $200,000/yr, what's the total payroll?  It should be $200K x 4 or $800,000.

Now if you add in that 5th player at $400,000 what is the total payroll of all 5 players?  It should be $800,000 + $400,000 = 1,200,000.  From there you can find the average of the 5 players by dividing!

Help pls. Given l || m || n, find the value of x.

Answers

Answer:

41

Step-by-step explanation:

By transversal parallel lines theorem, x=41

answer:

x = 41

- use the rules to solve it

5.
In rhombus QRST diagonals RT and QS are drawn. If m then which of the following is the measure of a 76
b 90
C 38
d 48

HELP ME PLEASE !!! thank you

Answers

Answer:

<STR = 38degrees

Step-by-step explanation:

Find the diagram attached

Complete Question:

In Rhombus QRST, diagonals RT and QS are drawn. If m<TSR = 104°, then which of the following is the measure of <SRT?

Sicne triangle STR is isosceles, hence the base angles are equal. Let the base angles be y

y+y+104 = 180

2y = 180-104

2y = 76

y = 38degrees

Since <STR = y, hence the measure of <STR = 38degrees

Pls help me fasttt I’ll give brainliest!!

Answers

Answer

Look at this

Step-by-step explanation:

National pride is patriotism

Please help ........

Answers

Answer:7.5

Step-by-step explanation: because of its size and diamiter its 7.5

PLZ HELP ASAP
What is the length of MN? Round your answer to the tenths.

Answers

Answer:

Can you put the picture of the triangle up

Step-by-step explanation:

I'll change my answer then

DON'T REPORT ME

Answer:

i need a picture to awnser your question

Step-by-step explanation:

in triangle pqr the measure of r=90 rp=3.7 and pq=9.5 find the measure of <Q to the nearest tenth of a degree​

Answers

Answer:22.9

Step-by-step explanation:

Fill in the blanks to make a true statement.

(2+___i) + (___+3i) = 6 + 8i

Answers

Answer:

(2+  5i) + (4 + 3i) = 6 + 8i

Step-by-step explanation:

2 + xi  + y + 3i = 6 + 8i

(2 + y) + xi + 3i = 6 +8i

(2 + y) + (x + 3)i = 6 + 8i

Compare real numbers

2 + y = 6

     y = 6 - 2

    y = 4

Compare imaginary numbers

x + 3 = 8

     x = 8 - 3

    x = 5

Bertie Beetke Walks so that he is always exactly 1.3 cm. Adam and walks so that he is always exactly 3.5 cm from crumb B the only two points at which they can meet, mark the points with crosses.

Answers

Answer:

I can not give an exact solution, because I can not draw in the given image and I don't know the scale of the image, but I can give a general way of solving this.

We know that a circle is a shape such that al the points are equidistant to the center.

So, if Bertie is always exactly 1.3cm from crumb A, then all the possible positions of Bertie are shown by a circle of radius = 1.3cm around crumb A.

And if Adam is always exactly 3.5cm away from crumb B, then the possible positions of Adam are shown by a circle of radius = 3.5cm around crumb B.

So to solve this problem, you need to draw these two circles, and the points where the circles intersect each other will be the points where Bertie and Adam could meet.

Simplify this equation 3m + 4 = -5

Answers

The solution to this is m=-3

Write an expression that can be used to produce vector g from vectors e and f.

Answers

Answer:

g=e+f

Step-by-step explanation:

e= (-1,5)=-1i+5j

f=(3,-4)=3i-4j

g=(2,1)=2i+j

Let there exist real constant a,b:

ae+bf=g

For i: -a+3b=2

For j: 5a-4b=1

[tex]\left[\begin{array}{ccc}-1&3&2\\5&-4&1\end{array}\right][/tex]

Solves and gives:

a=1

b=1

g=e+f

Find the value needed for the “?” to make the equation true.

1/x^? = x^6

Answer: ? =__

Answers

Answer:

[tex]? =-6[/tex]

Step-by-step explanation:

Given

[tex]\frac{1}{x^?} = x^6[/tex]

Required

Find ?

Apply law of indices

[tex]x^{-?} = x^6[/tex]

Cancel x on both sides

[tex]-? = 6[/tex]

Multiply both sides by -1

[tex]-1*-? = 6*-1[/tex]

[tex]? =-6[/tex]

w is less then or equal to 7
and greater than 3

Answers

The answer could be 4,5,6, or 7.

Give brainliest?

What percent of 6.6 is 28.71?

Answers

Answer:

28.71 x 0.066 = 1.89486

Step-by-step explanation:

MY
2B =
Cou
Round your answer to the nearest hundredth.
SA
A
MY
Pro
9
Pro
Tea
B
5

Answers

Answer:

<B = 56.25°

Step-by-step explanation:

Reference angle = B

Hypotenuse = AB = 9

Adjacent = BC = 5

Applying trigonometric ratio:

[tex] cos (B) = \frac{adj}{hyp} [/tex]

[tex] cos (B) = \frac{5}{9} [/tex]

[tex] B = cos^{-1}(\frac{5}{9}) [/tex]

B = 56.25° (nearest hundredth)

In complete sentences, answer the following question.



What are the elements of a body paragraph?

Answers

The elements of a body paragraph are the topic sentence, concrete detail, commentary then a conclusion.
The elements of a body paragraph are first, the topic sentence, evidence, elaborations, and then your conclusion sentence.

I hope this helps!! i used different words than the other person just in case.

To the nearest 10th, find the measure of the missing side.

Answers

Answer:

Climate change includes both global warming driven by human emissions of greenhouse gases, and the resulting large-scale shifts in weather patterns.

A school paid 31.50 for each calculator
If the school bought x calculators, how much did
they pay? Write an expression.

Answers

31.50(x) insert the amount of calculators that they have for X and then multiply to find the total amount that they payed

find the value of x ​

Answers

Answer:

x = 4

Step-by-step explanation:

10x + 140 = 180

10x = 40

x = 4

Answer:

x = 4

Step-by-step explanation:

I did 140 + 10x = 180

Then I solved by subtracting 180 - 140 to get:

10x = 40

Next you divide 10 on both sides to get 4 as x

What is the remainder when 16,055 is divided by 16? (Input numeric values only)

it can't be on a calculator
because you get the wrong number on there thenk you

Answers

Answer:56

Step-by-step explanation:

with 16 into 55 do that math then put the number you got then put it into another 16 boom 56

The frequency table shows the scores from rolling a dice

work out the mean

Answers

you have to add all of your frequency’s together and divide by 6 for the 6 scores. your mean would be 2

The fraction form of -1.6 is

Answers

Answer:

-1  2/3

Step-by-step explanation:

Which of the following gives a valid reason for using the given solution method to solve the system of equations shown?
Equation : 4x - 5y = 4
Equation il: 2x + 3y = 2
A Elimination, a coefficient in Equation 1 is an integer multiple of a coefficient in Equation II.
B. Elimination, a coefficient in Equation II is an integer multiple of a coefficient in Equation I.
C. Substitution, Equation I can be solved for x in one step by dividing both sides by 4.
D. Substitution, Equation Il can be solved for x in one step by subtracting 3y from both sides.

Answers

Answer:

A . Elimination, a coefficient in Equation 1 is an integer multiple of a coefficient in Equation II.

hope it is helpful...

PleSee help!!! 10 points for it

Answers

Answer:

ben birşey anlamadım sorundan

4
74
Solve the inequality 2(4x + 1) <3(2x - 3)

Answers

Step-by-step explanation:

2(4x + 1) < 3(2x - 3)

8x + 2 < 6x - 9

8x - 6x < -9 -2

2x < -11

x < -11/2

Quizziz 9th grade help please please

Answers

Answer:

(x-4)(x-12)

Step-by-step explanation:

If you need help factoring lmk i can help ya :)

(2,15) (-4,-3) in standard form

Answers

Answer:

pizza

Step-by-step explanation:

... :D

in which part of the number line would 112% be located?​

Answers

Answer:

It would be 1.12 away from 0

Simplify the expression (-502) square root 0

Answers

Answer:

[tex]-502\sqrt 0 = 0[/tex]

Step-by-step explanation:

Given

[tex]-502\sqrt 0[/tex]

Required

Simplify

[tex]-502\sqrt 0[/tex]

----------------------------------------

[tex]\sqrt 0 = 0[/tex]

----------------------------------------

So:

[tex]-502\sqrt 0 = -502 * 0[/tex]

[tex]-502\sqrt 0 = 0[/tex]

Molly and George earned 352 points together. Molly has half the number of points as
George. Which equation could represent this situation? Let g represent the number of
points George earned.

Answers

Answer:

Assume G = George

I can use the problem to find that:

G + 1/2G = 352

Other Questions
what is 24 x 0.02 mmmmmmmmm I need to find the x of the triangle. A fish tank is initially filled with 400 liters of water containing 1 g/liter of dissolved oxygen. At noon, oxygenated water containing 10g/liter of oxygen flows in at a rate of 5 liters per minute and the well-mixed water is pumped out at a rate of 7 liters per minute.Let A(t) represent the amount of dissolved oxygen in the tank at time t. a) Write the differential equation that represents the problem.b) Solve the differential equation. c) At 1 p.m., what is the amount of dissolve oxygen in the fish tank Write a summary about How a Bill Becomes a Law at the federal level, and the differences between the state and federal law making processes. who decides the voting laws states or the federal government my uncle has recently passed away his family has requested me to prepare an obituary for him who came up with the separation of powers? earth is one of the planets in the What happens to the reaction rate as the reactants get used up in a reaction?OA. The rate of the reaction is not affected by the concentration ofreactants.B. The rate of the reaction increases steadily as products are formed.OOOC. The rate of the reaction begins to decrease as reactants are usedupOD. The rate of the reaction stays constant until the reactants aregone. Which expression is equivalent to x^2+5x-36 Describe at least two principles the American Colonists used to justify their independence from Great Britain? Narrate an anecdote where your stubbornness or ego failed you and hasupset your friends and relatives. Select all ratios equivalent to 4:3. A bicycle wheel has a diameter of 46cm what is the radius PLEASE HELP AND EXPLAIN YOUR THINKING!!!!A storekeeper increased the price of hats by 5%.If the price of a hat (after the increase) is $33.60, whatis the original price? Please Real answers!Marcus has completed his education and received a degree in marine biology. Now that he is finished with school, Marcus compiles his resume. Which would be the most efficient way Marcus could look for a position in his field?A.) Marcus should ask people in his neighborhood if they know of any openings.B.) Marcus should wait for companies to reach out to him with job offers.C.) Marcus should put an ad in the newspaper saying that he is available.D.) Marcus should seek out websites of companies he would like to work for and fill out an online application. The hypotenuse of a right triangle is 50 mm. One leg of the right triangle is 30 mm. What is the length of the other leg?The hypotenuse of a right triangle is 50 mm. One leg of the right triangle is 30 mm. What is the length of the other leg? (4 points)Group of answer choices20 mm40 mm30 mm60 mm The price, p, of a game system is on 25% sale.Find the new price of the system after the sale discount. (giving brainiest) Read the poem Roadies:We are hidden figures, shrouded in darkness,In the wings, the bunkers, under the stage.Like ghosts, we move in another world,Doing what we do so the artist can engage.Most of us are here for love, not money.It's a labor of love. It's not for the wage.We are the crew setting up for the gig,Bustling like ants, hurrying to and fro.We look after the sound and control the lights,And the show must go on, wherever we go.We're not the dream weavers, but we make dreams happen,From Bangkok to LA, from Rio to Glasgow.We work when needed, by day and by night,To create the spectacle and get it just right.What is the meaning of the simile bustling like ants as it is used in the excerpt?A. Annoyed or acting unpleasantB. Busy or doing something quicklyC. Lazy or doing something slowlyD. Tired or doing something hard Which two areas will the transoceanic highway ink?a. the highest Andean mountains with the Argentine pampasb. Buenos Aires with Limac. Amazon River ports in Brazil with Peruvian ports on the pacific