Mathematics Middle School

Measurements of atoms, such as amounts, distances, and weights, are often very large or very small when compared to measurements of things you can see or touch. Scientific notation represents numbers as a power of 10. This makes very large or small numbers easier to use and understand. Approximately 7,500,000,000,000 carbon atoms fit across the period that you make with your pencil. Express this number in scientific notation. (PLEASE ANSWER FAST I'LL GIVE BRAINLIEST ALSO PLEASE DO ALL THIS IS WORTH 30 POINTS)


Step 1 Rewrite the number with a decimal after the first nonzero digit.7.500000000000


Step 2 Find the number of places and the direction you moved the decimal. If a number does not show a decimal, the decimal is at the right end of the number.You moved the decimal 12 places to the left.


Step 3 Drop the zeros, and write the number of places you moved the decimal as a power of 10. If you moved the decimal to the right, the power is negative. If you moved the decimal to the left, the power is positive.7.5 × 10 12


Step 4 Reverse the process to change scientific notation back to a whole number. A positive power of 10 moves the decimal to the right. A negative power of 10 moves the decimal to the left.


(Answer 1, 2, 3, 4 and 5 )


1. A sample of gold contains 3,800,000,000,000,000,000 atoms. Express this number in scientific notation.


2. A sample of silver contains 400,000,000,000,000 atoms. Express this number in scientific notation.


3. A sample of carbon has a mass of 0.000000000000000000034 kg. Express this mass in scientific notation.


4. A sample of silicon contains 5.23 × 10^11 atoms. Write this amount as a whole number.


5. The mass of a proton is about 1.67 × 10 -27kg. Write this mass as a whole number

Answers

Answer 1

Answer:

Step-by-step explanation:

1)3.8 *10¹⁵

2)4.0*10¹⁴

3)30.4*10⁻²⁰

4)523,000,000,000 atoms

5)0.000 000 000 000 000 000 000 000 00167

Related Questions

a diagram of a wheelchair ramp made of concrete is shown below how much concrete was used to make it?​

Answers

Answer:

Step-by-step explanation:

It uses 552 cubic feet of concrete
4*12*5 = 240
13*4/2*12 = 312
240+312 = 552

Pls pls pls help me!! I will give brainliest and points!!

Find the area of each trapezoid or kite.


Answers

Answer: 78

A=pq/2

13*12/2 = 78

1. 60.5; 2. 84

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Liz flips a coin 90 times. The coin lands head up 63 times and tails up 27 times. The theoretical probability of the coin landing heads up is ___​%.

Answers

Answer:

50%

Step-by-step explanation:

This question asks for the theoretical probability

In order to find theoretical probability, we find how many outcomes are possible, and how likely each action is.

In this case, we are flipping a coin. There are only two possible outcomes of this, which are heads and tails. Each of these are equally likely, so that would mean the theoretical probability of flipping it and it landing heads up is 50%

Answer:

P(head up) = 70%

Explanation:

P(head up) = 63/90

P(head up) = 7/10

P(head up) = 70%

Question: which glue is the best to fix a broken heart?

Answers

Answer:

gorilla glue

Step-by-step explanation:

Friendship glue. But not too much

A store pays $71 for a guitar and marks the price up by 20%. What is the new price?

Answers

20% of 71 is 14.20
71+14.20=£85.20
hope this helps

please help mee on this question

Answers

Answer:

52 yards squared

Step-by-step explanation:

Split the two shapes into two rectangles. Area of first one is 3*4=12 yRDS SQUARED. second area is 10*4=40 yards squared. 40+12=52 yards sqared

can i get a graph please

Answers

hey it’s to blurry to see
It’s too blurry I need a better picture

PLS HELP ME IS DUE AT 11:59 THE QUESTION IS IN THE IMAGE THO!!! ​

Answers

Answer: The distance between those two points is 10.

Step-by-step explanation:

Answer:

-7 :D

Step-by-step explanation:

GET THE ANSWER WRONG KIDD!!! LOL HEH    P .  .O .  .G

Pls pls pls help me! I will give brainliest and points!

Find the area of each trapezoid or kite.

Answers

i know this isn’t an answer but don’t click links!!!!
3. 48; 4. 28 i think

plsss help this is due today

Answers

It’s 20cm :) because knowing that you have a 3:5 ratio and that one side is 12 can you can make a ration table so 3:5 and 12:? And to get from 3 to 12 you have to multiply 3 by 4 so you have to do the same to the other side 5 times 4 is 20 so 20 cm
It’s 20 cm shjfkdbdbfjkfnfnfj

Solve the system using addition. Use pencil and paper. Explain why the addition method is a good choice for solving the system. If you wanted to solve for x​ first, is the addition method still a good​ choice? Explain.

x-2.5y=12.5
-x+2.3y=11.9

Answers

Answer: the answers are x = -292.5 and y = -122

Step-by-step explanation:

Elimination is combining equations to obtain an equation with just one variable. This is only possible if the coefficients of one variable in both equations are opposed and will cancel each other out when put together. Elimination is most effective when it occurs naturally in the equations, but equations may also be modified to produce typical coefficients by multiplying or dividing equations by a given value. The next step would be to utilize the equation we devised to determine the variable's worth and then insert that value back into the original equation to determine the remaining variable.

For solving the question to find x we have to make the coefficients of y the same. for that, we will multiply the first equation by 2.3 and the second equation by 2.5.

After that, we get the 2 equations as

2.3x-5.75y = 28.75

-2.5x+5.75y = 29.75

then by adding the 2 equations we get

-0.2x = 58.5

and by dividing 58.5 by -0.2 we get

x = -292.5

substituting the value of x in any equations above we get

y = -122

Please help me answer these questions

Answers

Answer:

B and D

Step-by-step explanation:

4x13=52 and 10/10=1 x 13=13

I'm pretty sure it's A and c

plese help me with question.

Answers

Answer:

c

Step-by-step explanation:

You can go ahead and emilminate a and d because there are no 4.6.Then you can emilminate b because the quartiles must be even and 4.7 and 6 are not even

giving brainly answer quick noob

Answers

Answer:

Ok

Step-by-step explanation:

Answer:

g

Step-by-step explanation:

g

help again...............​

Answers

The answer to this would be

H. 30
I.48
J. 136

Answer:

h. 30, i. 42, j. 136

Step-by-step explanation:

Its really just basic math.

HELPP PLZ AND SHOW YOUR WORK

Answers

B :) working out in the photo

Please help!!! ill mark brainliest!!

Answers

Answer:

where is the question

Step-by-step explanation:

please help me im begging you :(( show ur work

Answers

Answer:

A

Step-by-step explanation:

first I put 3 in for all the a's then I just completed the equation.

24/2-6x2 =0 sooooooo

Please help! What is -(1/2) to the fourth power?

Answers

Answer:

1/16

/20char

/20char

/20char

/20char

/20char

-0.0625 is the answer to this question. Hope I was helpful!

A student did the calculation for three boxes of the T-shirts with the phrase “I Love Math” and got the incorrect answer shown. What did this student do wrong? What is the correct answer?

what is 26 x 3 give an explanaition step by step pls

Answers

the answering your looking for is 78.
I believe the correct answer is 78

What is the volume of the pyramid?

I will report if you send links

Answers

Answer:

The answer is 1133.33 i got it from go ogle so blame me if i got it wrong blame go ogle  can i have Brainliest

Step-by-step explanation:

Answer:

66 2/3

Step-by-step explanation:

The way to solve this is The general volume of a pyramid formula is given as: Volume of a pyramid = 1/3 x base area x height. Where Ab = area of the polygonal base and h = height of the pyramid. Note: The volume of a pyramid varies slightly depending on the polygonal base.

What i did was i first tried to do 17 x 20 x 10 which game 3400 but when i remembered that V=1/3 x base area x height which would be 1/3 x 17 x 20 = 113 1/3 but if the base was 10 it would be 1/3 x 10 x 20 = 66 2/3. so i think the base is 10 and the answer would be 66 2/3

If i am wrong i'm sorry

Hey im starting and i have a few rough ones/8ft.=_in. Thanks!

Answers

Answer 8ft = 96inches
8ft = 96inches :)) hope I helped out a lil

Please help me ASAP. NO LINKS PLEASE. 8TH GRADE
The last question!

Answers

(5+10)+(6+8) i don't understand the question
3 weeks bc that is the point on the line

Can someone help me?

Answers

The answer is three

PLEASE PLEASE HELP ME ASAP!!!!!!!

Answers

103 degrees i think

Its 47! :)))

Have a good day!

Can you please help?

Answers

can’t help DDDD: bcoz link is a scam

Consider the table:
Input value Output value
0 0
1 1
2 4
3 9

Which statements are true? Select all that apply.
The graph of the function will not form a straight line, so it is nonlinear.
The function is not proportional.
The function goes through the origin.
The difference between consecutive output values is a constant.

Answers

Answer:

1st 2nd and 3rd box

Step-by-step explanation:

1. It does not form a straight line because the output is not proportional. (it does not follow a pattern)

2. the line is not proportional because it does not follow a pattern or ratio of any kind (2468 is proportional because it follows the pattern of 2)

3. the origin is the coordinates (0,0) and the table has that labeled in the diagram therefore the graph does go through the origin

4. the output is not constant (output is 0149) because it does not show any sort of pattern. therefore the 4th box is incorrect.

help me please asap!!!!!!!!!14 points:)

Answers

Answer:

1. C

2. B

3. D

5. C

6. B

Hope this helped

Step-by-step explanation:

solve the equation -2(x-5)=-14

Answers

Answer:

x=12

Step-by-step explanation:

-2(x-5)=-14

x-5=-2/-14

x-5=14/2

x-5=7

x=5+7

x=12

X =12. Multiply it out. -2x +10= -14. -2x=-14-10. -2x= -24. Divide both sides by -2. Hope this helps!

Can anyone help?? I need this today so i can pass

Answers

Answer:

b

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

It is because -15 is lower than -9, so it is -15<-9

-9 is higher than -11, so it is -9>-11

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