You have 40 grams of a radioactive kind of tellurium. If it's half life is 9 hours, how much will be left after 18 hours

Answers

Answer 1

Answer:

10 grams

Step-by-step explanation:


Related Questions

The number 3.14159, correct to 3 decimal places, is?​

Answers

Answer:

3.142

Step-by-step explanation:

59 is above 0.5 so therefore that part needs to be rounded up to 3.142.

4X + 5Y = 21
-4X + 8Y = -8
And
X + 5Y = 5
3X - 5Y = 3

Answers

Answer:

for the first one

Step-by-step explanation:

(x,y)=(4,1)

Mark spent $135 on his comic book collection. He just sold it online for $310. Approximately what is the profit as a percent of his original cost?

Answers

Answer: $4.45

Step-by-step explanation: you will get $4.45

Answer:

it should be 445%

Step-by-step explanation:


Can someone explain to me how to solve this kind if problems?

Answers

Answer:

You would have to Multiply

Step-by-step explanation:

The scatter plot shows the number of minutes each of 28 people played a video game and the number of levels each person completed in the video game. Which statement is best supported by the scatter plot? Please help me!!!

Answers

Answer:

28 people played a video game

Step-by-step explanation:

Please! I’ll give brainliest!

Answers

Answer:

a. fill in 8out of the 10 rows of the grid. Then subtract 3/10ths of the squares that are filled in

b. 70/100 x 8/10 = 14/25 kg

c. 0.7 x 0.8 = 0.56 kg

d. less, by 0.24 kg

I hoped this helped! :)

How many solutions does this equation have?

–5d + 6 = 6 − 5d

Answers

Answer:

maannnyyy

Step-by-step explanation:

the hypotenuse of a 45-45-90 triangle has a length of 10 units what is the length of one of its legs

Answers

let the other side be x therefore by pythagoras theorem
(x^2) + (x^2) = 10^2=100
so x^2=50
so x=5√ 2

can I get some help;

Answers

Answer:

I was never good at this in math...

Answer:

X = 30

Y = 14

Step-by-step explanation:

x/20 = 18/12

multiply both sides by 20

x = 18/12 x 20 = 30

y/21 = 12/18

multiply both sides by 21

y = 12/18 x 21 = 14

The lines represented by the equations 20y−24x=−20 and 5y−6x=−5 are...

a)perpendicular
b)the same line
c)neither parallel nor perpendicular
d)parallel

Answers

Answer:

parallel i think

Step-by-step explanation:

parallel because it's a unknown error

Answer:

Choice B

Step-by-step explanation:

The best way to compare two lines is to solve for y.

The first equation:

For [tex]20y-24x=-20[/tex] the first thing we should do is add the 24x on both sides which will cancel out itself on the left side [tex]20y=24x-20[/tex]. Now all we have to do is divide the 20 on both sides to leave us with [tex]y=\frac{6}{5}-1[/tex].

The second equation:

For [tex]5y-6x=-5[/tex] the first thing we should do is add the 6x on both side which will cancel itself on the left side [tex]5y=6x-5[/tex]. Now all we have to do is divide the 5 on both sides to leave us with [tex]y=\frac{6}{5}x-1[/tex].

Now for the comparison:

They are the same exact line. If you were to graph them they would overlap each other.

Solve 2(2 – x) = 3x + 4.

Answers

Answer:

Step-by-step explanation:

2(2 – x) = 3x + 4.

4 - 2x = 3x + 4

-5x = 0

x = 0

64 is 66 2/3% of what number

Answers

64=(66+2/3)x. X=0.96

Answer:

Step-by-step explanation:

0.95

Solve for x: -9x + 13 = -14

Answers

Answer:

3

Step-by-step explanation:

- rearrange: -9x= -14 -13

x = -27/-9 = 3

X is 3, 27+13=-14 x=3

7x/12 -11= -8

what is x?
pls hurry I need help.
DO NOT convert to a decimal

Answers

Answer:

x = 5  1/7

Step-by-step explanation:

7x/12 -11= -8

7x/12 = 3

x = 3 . 12 /7

x = 36/7

x = 5  1/7

8th Grade Math.Help me Lol Thanksss Which graph represents a decreasing trend?​

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The last graph

Because it's going toward the negative numbers.

Help will give crown!!

Answers

Answer:

Mixed number: [tex]3\frac{15}{100}[/tex]

Improper fraction: [tex]\frac{315}{100}[/tex]

Step-by-step explanation:

A mixed number is a number that contains an integer part and a fraction part.

An improper fraction is a fraction where the numerator is greater than the denominator.

[tex]3.15[/tex] can be written as [tex]\frac{315}{100}[/tex] in its fraction form. This would be an improper fraction since the numerator is greater than the denominator.

The mixed number is [tex]3\frac{15}{100}[/tex] since [tex]100[/tex] goes into [tex]315[/tex] three full times and the remainder is [tex]15[/tex].

∴The mixed number is [tex]3\frac{15}{100}[/tex] and the improper fraction is [tex]\frac{315}{100}[/tex].

Other guy who answered is right

Helen draw a massive circle she the

Answers

What do you mean what’s the question

what is -1/6 multiplied by 6

Answers

Answer:

[tex]-1[/tex]

Step-by-step explanation:

Step 1:  Multiply

[tex]-\frac{1}{6} * \frac{6}{1}[/tex]

[tex]-\frac{1*6}{6*1}[/tex]

[tex]-\frac{6}{6}[/tex]

[tex]-1[/tex]

Answer: The correct answer is -1

A restaurant sells 6 tacos for $5.40. What is the unit rate?

Answers

Answer: 90 cents a taco.

Step-by-step explanation:  To find the rate in this case, we can simply divide the cost by the given number of tacos, (5.4 / 6), yielding .90. Consider marking this answer as brainliest if it helped you out.

please andwer this for me <3

Answers

Answer:

C

Step-by-step explanation:

16 : 12

x   : 6

- multiply 16*6 and divide by the number multiplying with the unknown (12)

(16*6)/12 = 8

- area of triangle is 1/2 h*b

so 1/2 * (16*8) = 64

2. Which of the following is contained in the solution for the
inequality 5x < 3(x + 2) + 2 ? Justify your answer for full credit.
A.
4
C. 7
B.
2
D.
15

Answers

The answer should be D
X>- 16/3
I used the calculator

Answer the following questions below using the image

Answers

Answer:

A. 25:30

Sorry I'd help with the rest but my brain kinda died

What is the slope of a line parallel the the line whose equation is x+y=5. Fully reduce your answer.

Answers

Answer:

m = -1

Step-by-step explanation:

Find the slope of this line.

x+y=5

y= (-1)x+5

Slope (m) = -1 <-- from y = mx+b

A line parallel to the line will have the slope -1.

What are the three ways that you can measure pH?

Please help

Thank you

Answers

Answer:

Beginner. Use a paper strip coated in a pH indicating dye. Dip the strip into the water and wait for the strip to change color. ...

Intermediate. Use a pH testing kit for liquids. ...

Advanced. A digital pH meter can be used to obtain the most accurate reading of the pH level.

Step-by-step explanation:

how to graph -2 f(x)

Answers

The guy above me is right!!!!

PLEASE HELP
(-1,1)

(0,-1)

(5,-11)

(10,-21)


What is the domain of the set of ordered pairs above?

A.

{1, -1, -11, -21}

B.

{-1, 1}

C.

{-1, 0, 5, 10}

D.

{-1, 10}

Answers

What is the domain of the set of ordered pairs above

c {-1 ,0, 5, 10}

Answer:

c {-1 ,0, 5, 10}

Step-by-step explanation:

Jamal has a plan to save money for a trip. Today, Jamal deposits $10.00 into the savings account. Each week, Jamal will add $5.00 to the amount that is deposited into the savings account. The table below shows the relationship between the number of weeks and how much money, in dollars, Jamal deposits into the savings account.



Let f(x)represent the amount of money Jamal deposits into his savings account at the end of x weeks. Based on the table, what is f(10)?

Answers

Answer:

y = 5x + 10

Step-by-step explanation:

using the formula y = mx + b you can easily find the answer.

where

m = the rate of change

b = constant

x = the independent variable

Since he has the initial $10.00 added to the account, we know that is the constant since he won’t be adding that anymore.

Since he will be adding $5.00 to the account every month we know that this is the rate of change.

the variable x will change depending on the number of months passed.

Therefore we can create the equation:

y = 5x + 10

end of each of the next 20

Suppose you earned a $555,000 bonus this year and invested it at 8.25% per year. How much could you withdraw

years?

Select the correct answer.






a. $57,592.18

b. $57,500.68

c. $57,575.18

d. $57,609.18

e. $57,583.68

Answers

Answer:

Annual withdraw= $57,583.68

Step-by-step explanation:

Giving the following information:

Present Value (PV)= $555,000

Interest rate (i)= 0.0825

Number of periods (n)= 20

To calculate the annual withdrawals, we need to use the following formula:

Annual withdraw= (PV*i) / [1 - (1+i)^(-n)]

Annual withdraw= (555,000*0.0825) / [1 - (1.0825^-20)]

Annual withdraw= $57,583.68

Please help!!!
The cost of producing n necklaces is p(n)=15n + 60. The necklaces cost $30, which can be represented by c(n) = 30n. For how many necklaces does the cost of production equal the sales?

Answers

Answer:

4 necklaces

Step-by-step explanation:

when p(n)=c(n), the cost equals the sales

15n+60=30n

60=15n

n=4

help asap!!

The graph of a linear function is shown on the grid.

Which equation is best renresented by this graph?

Answers

the equation is y=3/4x-3
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