A sample of copper (Cu) contains 69.17% Cu-63. The remaining copper atoms are Cu-65. What is the average atomic mass of copper?​

Answers

Answer 1
The atomic mass is 63.55 amu

Related Questions

what is the range of this function(–11, 8) (13, 7) (14, 7)

Answers

Answer:

The range is { 7,8}

Step-by-step explanation:

The range of the functions is the output values

We do not list the repeated values more than one and normally list them from smallest to largest

The range is { 7,8}

URGENT NEED HELP
-3^3+square root of 21
Litterly tried everything can’t figure it out , even cried please help

Answers

then try -21.4 that should work

Whoever answers first gets the brainliest Given : f(x)=-|x+9|
What direction does the graph move?______ How far?_____
What axis does the graph reflect over?____

Answers

Answer:

See below.

Step-by-step explanation:

f(x) = -|x + 9|

compared to

f(x) = |x|

has a graph that opens downward in an upside down V shape.

It has been moved 9 units left compared to the graph of f(x) = |x|.

It reflects over the x-axis.

Last week, Tina worked 40 hours in 4 days. She worked the same number of hours each day. How many hours did she work each day? Which equation below matches this situation.

Answers

She works 10 hour per day

negative sixteen plus the quotient of a number and -4 is -3​

Answers

Answer:

The number is 76

Step-by-step explanation:

what happens when you raise -2 to a power

Answers

Answer: it becomes a positive

Step-by-step explanation:

Find the difference
16-(-4)
i need help ASAP

Answers

the answer is 20!
you need to change the subtraction sign to an addition sign and change -4 to a 4. then, solve!
hope this helps!!

A square rectangle has a length of 9.00 inches and a width of 4.25 inches. What is the area in square inches? Round to the correct significant digits.

Answers

Answer:

38.3

Step-by-step explanation:

multiply l x w to get your answer then just round. Hope it helps!!

Matthew drove 74 miles in 2 hours. On average,how fast did he drive in hours per mile?

Answers

Answer:

37 mph

Step-by-step explanation:

Step 1:

74 ÷ 2

Answer:

37

Hope This Helps :)

r + 4 > 8 ; r= 2 i need help asap

Answers

Answer:

Step-by-step explanation:

2 + 4 > 8

6 > 8

not true

Along the U.S. Atlantic coast, the sea level is rising about 2 millimeters per year. Joe is 13 years old. How many millimeters has sea level risen since Joe was born?

Answers

26 mm

Because 2mm x 13 years = 26

4 times the sum of a number and 5 is 1 less than the same number

Answers

x = a number

4(x + 5) = x - 1

Now, let's distribute the 4

4x + 20 = x - 1

Subtract x and 20 from both sides.

3x = -21

Divide both sides by 3

x = -7

A letter in the word UNIVERSITY is chosen. What is the theoretical probability of choosing an I? *

Answers

Answer:

There is a 1 in 5 chance that the letter will be I.

Step-by-step explanation:

There are ten letters in the word and 2 are I's. 2/10 simplifies to 1/5.

Answer:

2/10 or 20%

Step-by-step explanation:

if you were to pick at random

out of all i would have a 20 percent chance to be chosen

In the figure below, points A, E, F, and C lie in plane X.
Points B and D do not lie in plane X.
For each part below, fill in the blanks to write a true statement.
B
(a) FC and
are distinct lines that intersect.
A.
X
C
E
F
(b) B. I, and I are distinct points that are collinear.
(c) Another name for plane X is plane I.
(d) E, I, I, and I are distinct points that are coplanar.

Answers

Answer:

a) FC ←→ and BD ←→ are distinct lines that intersect.

b) B , C and D are distinct points that are collinear.

c) Another name for plane [tex]X[/tex] is plane AEF.

d) E , A , F and C are distinct points that are coplanar.  

Step-by-step explanation:

The first step to solve this question is to look carefully at the picture.

For a) :

We can see that the line FC and the line BD intersect at the point C.

We can write :

a) FC ←→ and BD ←→ are distinct lines that intersect (we can see more lines that intersect with FC ←→ in the picture such as AC ←→  or AE ←→).

For b) :

We can see that the line BD ←→ passes through the points B , C and D (B , C and D are collinear points).  

We can write :

b) B , C and D are distinct points that are collinear.

For c) :

We can name any plane using three points which are contain in the plane but this three points must not be collinear points.

We can name the plane [tex]X[/tex] using the points A , E and F (this is a possible solution).

We can write :

c) Another name for plane [tex]X[/tex] is plane AEF.

Finally, for d) :

Two or more points are coplanar wherever they belong to the same plane.

In the picture, the points A , E , F and C belong to the plane [tex]X[/tex].

We can write :

d) E , A , F and C are distinct points that are coplanar.

n-8=-4+5n solve for n.

Answers

Step-by-step explanation:

Hey there!!!

Here,

Firstly, Shift n to right side and -4 to the left side, because we always try to have variable as positive.

[tex] - 8+4 = + 5n-n[/tex]

Now, Simplify them.

[tex] - 8 + 4 = 5n - n[/tex]

[tex] - 4 = 4n[/tex]

You should divide now.

[tex]n = \frac{ - 4}{4} [/tex]

Therefore the value of n is -1.

{ As now you can keep it on left side. We generally find the vallue of variable by keeping it on left side. But we kept it right side in solution to avoid our confusion because if we kept it on left side and you would get harder to find the value at last as we need to transpose (-) to the right side value of n}.

Hope it helps...

SO Problem -3.62 + 18.57 =

Answers

Answer:

18.57- 3.62

___________________

14.95

Help my teacher hates me enough already.

Answers

Answer:

jh

Step-by-step explanation:

uirhgurhehgu5rhginiurogherughre hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Answer: 6.72 x 10^-5. The number is an extremely small number that started out as 6.72. You would divide the number by 10, so many times to get this number. Since the number is small, the exponent is negative. The exponent tells how many times the decimal point will be moved to the left. If the number started as 6.72 and is now 0.0000672, that means that the decimal point moved 5 times to the left.

What is 17 1/3 x 8 and how much water will each group get

Answers

Answer:

The Answer to 17 1/3 x 8 is 138.67

There is not enough context to answer the second question.

7 + 2x/3=5
what’s x?

Answers

Dhdidbfvuddjendjdifbdkdbfjdidnd it’s 8

What are the correct answers for this?

Answers

1) variable
2) value
3) absolute value (maybe)
4) natural numbers
5) whole numbers
6) integers

Simplify 2(x-4) +3^2

Answers

Answer:

Step-by-step explanation:

2x - 8 + 9

2x + 1

Answer:

YOUR ANSWER IS 2x+1

HOPED THAT HELPED☺

Step-by-step explanation:

2(x-4) +3^2

multiply 2 to(x-4)

solve for 3^2

2x-8+9

add -8to9

2x+1

Please answer this question! it's due in a few hours if you don't mind!

Answers

Answer: 45 Seconds

Step-by-step explanation: Because if you do 3/4=0.75 or 75%. Knowing that a minute is 60 seconds long. 75% of 60 is 45 Seconds.

Hope this helped!

what is this statement Segment AB is congruent to segment AB.

Answers

Answer:

reflective

Step-by-step explanation:

This statement shows the reflective property.

Find AC if AB = 17 and BC = 9

Answers

Answer:

ANSWER:-

Step-by-step explanation:

AB+BC=AC

17+9

=26 is the answer.

(9+33-6)-3-7?
can someone also explain it i don't really understand :( thx! ​

Answers

Answer:

26

Step-by-step explanation:

APPLY PEMDAS:

Evaluate the numbers in the parentheses before evaluating the whole equation.

[tex](9+33-6)-3-7\\\\36 - 3 -7\\\\33-7\\\\\boxed{26}[/tex]

Hope this helps.

Ronald rents a car from Cheap Rent-a-Car for $25 plus $0.05 per mile. Dixon rents a car
from Great Cars for S40 plus $0.03 per mile. How many miles must they both drive for
their rental fees to be the same?

Answers

Answer:

750 miles

Step-by-step explanation:

Ronald

Rental fee = fixed cost + variable cost

= $25 + $0.05x

Where x = number of miles

Dixon

Rental fee = fixed cost + variable cost

= $40 + $0.03x

How many miles must they both drive for their rental fees to be the same?

Equate the two equations

$25 + $0.05x = $40 + $0.03x

Collect like terms

0.05x - 0.03x = 40 - 25

0.02x = 15

Divide both sides by 0.02

x = 15 / 0.02

= 750 miles

-7=-x

One step equations ( Find X)

Answers

Answer:

answer of your question is

-x= -7

the answer to this question is
x=7

Write the equation g(x) of the transformation of the parent graph f(x) = |x| stretched vertically by a factor of 2, reflected over the x-axis, and translated left 1 unit and down 3 units.

Answers

Answer:

g(x) = -2|x+1| -3

Step-by-step explanation:

f(x) = |x|

y = f(x) + C C < 0 moves it down

y = |x| -3  for  shifting down 3

y = f(x + C) C > 0 moves it left

y = |x+1| -3 for move it left 1

y = Cf(x)  C > 1 stretches it in the y-direction

y = 2|x+1| -3 to stretch it 2 vertically

y = −f(x)  Reflects it about x-axis

y = -2|x+1| -3

We start off with f(x) = |x|

c < 0 means move down

y = f(x) + c

3 units down

After: y = |x| - 3

c > 0 means move left

y = f(x + c)

1 unit left

After: y = |x + 1| - 3

c > 1 means y direction stretch

y = cf(x)

2 unit stretch

After: y = 2|x + 1| - 3

Reflect across x-axis can be stated as y = -f(x)

After: y = -2|x + 1| - 3

Best of Luck!

Evaluate R - Y for R = -2 and Y= -7

Answers

Answer:

5

Step-by-step explanation:

Replace variables with integers

(-2) - (-7)

Solve.

-2 - (-7) --> -2 + 7 --> 5

If t = -3, what is
[tex] \sqrt{6 - 25t} [/tex]

Answers

Answer:

[tex]9[/tex]

Step-by-step explanation:

So we have the expression:

[tex]\sqrt{6-25t}[/tex]

And we want to find the value of the expression when t is -3.

So, substitute -3 for t:

[tex]\sqrt{6-25(-3)}[/tex]

Multiply:

[tex]=\sqrt{6+75}[/tex]

Add:

[tex]=\sqrt{81}[/tex]

Evaluate:

[tex]=9[/tex]

So, our answer is 9.

And we're done!

If t=-3, then the square root would look like this:
6-75 squared. 6-75 is 69. 69 squared is 8.3.
Hope this helped
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