Mathematics Middle School

1 kg of sand has a volume of 400 cm*. What is its densityin g/cm*.
( * is cubed)

Answers

Answer 1
Given mass=1 kg, volume=400cm³, density=?
The formula for finding density is ρ=m/v where ρ is density, m is volume and vis volume
ρ=1kg/400cm³
ρ=0.0025kg/cm³
Therefore the density of the sand is 0.0025kg/cm³

Related Questions

what is long division 831÷4

Answers

207 with a remainder of 3 hoped i helped
It would look like this[tex] 4\sqrt{831} [/tex]


4 x 207.75 = 831

Eric downloads a 10% off any one item coupon and goes shopping at Gadgets Galore, where he buys a digital camera for $93 and an extra battery for $13.99.

Answers

I assume the question is asking how much he paid...?

If so, he has 10% off from 100% of the original price.
100% - 10% means he will pay 90% of the original price.
To find the original price we must add the price of the two items together to get the total price.

$93 + $13.99 = (I will let you do the math.)

Then we must multiply the total price by the percentage he paid (90%).
To do this we must convert 90% into a decimal.
Percent(%) is just a way of saying "Out of 100".
So 90/100 = .90

For the final answer multiply:  .90 * total price = answer.

which number below rounds 7.56 when rounded to the nearest hundred 7.564 C 7.565 b 7.569 or 87.56

Answers

The answer to your question is 7.564
The correct answer is C 7.565

The difference of a number p and 6

Answers

p-6 because you subtract the variable from the 6 
Final answer:

The difference of a number p and 6 is an algebraic expression represented by the equation 'p - 6'. To solve this, subtract 6 from the variable number p.

Explanation:

The difference of a number p and 6 is an expression usually used in the context of algebra.

This expression tells you to subtract the number 6 from the variable number p.

In mathematical terms, this fact is represented by the equation p - 6.

For example, if p equals 10, the difference of p and 6 will be 4, because 10 - 6 equals 4.

p=10

p-6=10

p=4

Learn more about Algebra here:

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8 and 5/6 +8 and 1/2 + 24 and 1/3=?

Answers

la respuesta es 40 y 90/36 ya que al sumar los enteros y despues las fracciones nos da este resultado
Glad to help
-first turn 8 5/6, 24 1/3 and 8 1/2 into improper fractions ( multiply whole number by denominator and add numerator)
- 8 5/6: 6 x 8+ 5= 53
- improper fraction is 53/6
- 8 1/2: 8 x 2 + 1= 17
- improper fraction 17/2
- 24 1/3: 24 x 3 + 1= 73
Improper fraction: 73/3
- now find the least common denominator among these which is 6.
New fractions would be
146/6 + 53/6 + 51/6= 250/6
250/6 simplified to 41 and 2/3
Answer is 41 and 2/3

A retail florist paid a certain price for a dozen roses. The florist marked up the price by 20%. The florist sold the dozen roses for $14.40. Sydney paid a certain price for a dozen roses and marked them up by 30%. She sold the roses at a local farmer’s market for $12.35. What is the difference in the prices of the dozen roses before markup? A. $2.50 B. $2.30 C. $2.20 D. $2.05

Answers

The answer is very simple. You just subtract $14.40 and $12.35. You would then get D.$2.05

Answer:

B

Step-by-step explanation:

what is 9/25 as an equivalent fraction and as a percent

Answers

equivalent: its already equivalent
percent: 36%

9/25 is equivalent to 36/100 as a fraction and 36% as a percent.

To find an equivalent fraction for 9/25 .

9/25 x 4/4

= 36/100

So, an equivalent fraction for 9/25 is 36/100.

To express 9/25 as a percent

First, convert the fraction to decimal form and then multiply by 100 to obtain the percentage:

= 9/25 x 100

= 0.36

= 0.36 x 100

= 36%

Therefore, 9/25 is equivalent to 36/100 as a fraction and 36% as a percent.

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One serving of milk has 120 calories. If one serving is equal to one cup how many calories are in one fluid ounce. 1 Cup = 1 fluid ounce

A. 10
B. 12
C. 16
D. 15

Answers

Well one cup dose not equal one fluid ounce but there are 8 fluid ounces in one cup so you divide 120 by eight and you get 15 calories for one fluid ounce. So your answer is D.

13 is what percent of 16

Answers

100%/x%=16/13
(100/x)*x=(16/13)*x
First thing to do is multiply both sides of the equation by x: 100=1.23076923077*x      
Next we shall divide both sides of the equation by (1.23076923077) to get x
100/1.23076923077=x 
81.25=x 
So now your final answer is:
13 is 81.25% of 16

Good luck~
Babs

100%/x%=16/13

(100/x)*x=(16/13)*x

First thing to do is multiply both sides of the equation by x: 100=1.23076923077*x      

Next we shall divide both sides of the equation by (1.23076923077) to get x

100/1.23076923077=x

81.25=x

So now your final answer is:

13 is 81.25% of 16

what is the greatest common factor of 330 and 490

Answers

10 :) . 390/490 = 39/49 ( I needed to add something else )
the answer is 10 so that's the answer to your question 

A carpenter makes legs for 3-legged stools and 4-legged tables. He makes a total of 57 legs.

He could have made legs for how many 3-legged stools?

Answers

4 legged tables : x 3 legged stools : y x + y = 20 y= 20 - x 4x + 3y = 68 Replace y by 20 - x so we only have one letter 4x + 3(20 - x) =68 4x + 60 - 3x =68 x + 60 = 68 x = 8 To find y replace x by 8 y = 20 - 8 y = 12 So you have 8 four legged chairs and 12 three legged stools. Hope I helped!
19 legs for 3-legged stools

Write addition fact that helps you to solve 12-4

Answers

Possibly 8+4 because 8+4 equals 12

Subtraction Is 12-4 equal 6

38 1/4 divided by 4 1/2

Answers

use a calculator its not that hard
make the two mixed fractions an improper fraction
38 1/4 = 153/4 and 4 1/2= 9/2
153/4 divided by 9/2
153/4 x 2/9
= 17/2 or 8 1/2

jamal works in a city and sometimes takes a taxi to work. The taxicabs charge $1.50 for the first 1/5 mile and $0.25 for each additional 1/5 mile. Jamal has only $3.75 in his pocket. What is the maximum distance he can travel by taxi if he does not tip the driver?

Can someone help with this question please?

Answers

9/5 of a mile, or 1 and 4/5 miles
It will get him 1.8miles.
He pays 1.50 for the first mile so take 1.50 from the 3.75 and you will get 2.25$.
So take the 2.25 and divide it by how much he will have to pay for each mile .So 2.25/0.25 and you get 0.09 .But you can also just take 1.50 away from 3.75 and get 2.25 the count how many quarters is in 2.25. but you will have to multiply 9 by 1/5 which is 1.8 miles .Its that or 9

a go carts too speed is 607200 feet per hour. what is the speed in mph?

Answers

The answer is 115 miles per hour
The speed in mph is 115 mph because there are 5280 feet in a mile, so you just divide 607200 by 5280, and you would get 115 mph.

A CD player is on sale for $90 at an electronics store. If the original price was $125, what was the percent of discount

Answers

This is the working of how it is 28% discount

Find the amount of discount : $125 - $90 = $35
Divide by the original price : $35/125 = 0.28
Change in to percentage : 0.28 x 100 = 28%

Therefore the percentage discount is 28% off

:)

What is the approximate percent decrease when a fish count goes down from 850 to 500?

Answers

Answer:

About 40%

Step-by-step explanation:

It would normally be 41.--% But rounded is the approximate percent so it would be 40%. I hope this helps you! :)

Answer: 41%

Step-by-step explanation:

The change in fish count = [tex]850-500=350[/tex]

The percent decrease when a fish count goes down from 850 to 500 is given by :-

[tex]\text{Percent decrease}=\frac{\text{Change in fish count}}{\text{Previous fish count}}\times100\\\\\Rightarrow\text{Percent decrease}=\frac{350}{850}\times100\\\\\Rightarrow\text{Percent decrease}=41.176470588\%\approx41\%[/tex]

Hence, the approximate percent decrease when a fish count goes down from 850 to 500= 41%

Admission to a car show costs $5 for each ticket. After selling only 20 tickets, they decided to lower the price to $3 each. If they raise $217 ,how many tickets did they sell in all?

Answers

First you would multiple 5 × 20 which equals $100 then you would subtract $217 by $100 and you would get 39 tickets and then you would add your twenties tickets and your 39 tickets together to get your answer which is 59 tickets.
First you do 5x20=100 then you need to find out what is the closes thing to 217 so you do 3x40=120 then you subtract 3 from 120 to get 117. Then you take that 20 pictures and the 39 from the 40 then subtracting 1 then do 20+39=59. Which means they sold 59 tickets

a pitcher can hold 1 7/8 how many 2/5 pint glasses can the pitcher fill

Answers

only 5 glasses because:
[tex] \frac{17}{8}[/tex] ÷ [tex] \frac{2}{5} [/tex] = 5 [tex] \frac{5}{16} [/tex]
17/8 divided by 2/5 = 5 5/16 therefore just 5

what is 820 divided by 42

Answers

The correct answer to 820/42= 19.52 (rounded answer would be 20). I hope I helped :)
Your answer is 19.5.. Hope this helps :)

break apart the addends to find the sum 33+49

Answers

19 if u add all separately but it is 89 it u don't

Find the solution to the system of equations graphed here

Answers

To find the solution of the system of equations, basically find the point whew the 2 lines intersect at, in this case it would be (1,3).

Answer:

The answer is C

Step-by-step explanation:

nadia has 4 sheets of stickers there are 8 stickers on each sheet .she wrote this number sentence to represent the totel number of stickers

Answers

Well if your asking 8-4 it's 4 and if your asking 8+4 it's 12

Answer:32

Step-by-step explanation:

This question requires multiplying.

Think of 4 sheets as 4 groups. If there are 8 stickers in the first group, we still have 8, then we will add 8 to the second group. We will have 16. Next we will add 8 to third the third group, 24, and third to the fourth group which will give us 32. 8,16,24,32.

Our equation will be 8×4=32

x - y = 3
x + 2y = -6


Giving out brainliest
SHOW ALL OF YOUR WORK☺

Answers

[tex]x-y=3[/tex]
[tex]x+2y=-6[/tex]

Subtract both equations to isolate and solve for y.

[tex](x-x)+(-y-2y)=3-(-6)[/tex]
[tex]0+-3y=9[/tex]
[tex]y=-3[/tex]

Now, solve for x in either equation by plugging in the y value.
I will choose the simpler first equation: [tex]x-y=3[/tex]

[tex]x+3=3[/tex]
[tex]x=0 ; y=-3[/tex]
x - y = 3 >> x = 3 + y
substituting this x in the second equation gives us
3 + y + 2y = -6 >> 3y = -9 >> y = -3
substituting this value of y in x = 3 + y gives us:
x = 3 + (-3) = 3 - 3 = 0

so the solution is: y = -3 and x = 0

I AM GIVING BRAINLIEST TO THE BEST ANSWER AND THE CORRECT ONE!!!!!
A jar holds 3/4 gallon of juice when it is 7/8 full. Which statement best describes the quotient of 3/4 divided by 7/8 ?
A The maximum amount of juice the jar can hold is 7/6 gallons.
B The maximum amount of juice the jar can hold is 6/7 gallon.
C The amount of juice that can be still poured in the jar is 7/6 gallons.
D The amount of juice that can be still poured in the jar is 6/7 gallon.

Answers

the correct answer is ''b'' because 3/4 is 6/8 and 7/8 is 7/8  so also is 6/7 i hope it helped u
B, I multiply 3/4 and 8/7. Cross multiply and got 6/7 .

Which quantity is proportional to 12⁄15? Check all that are true. 4⁄5 24⁄10 16⁄20 36⁄75 16⁄5

Answers

4/5 because 4 goes into 12 three times and so does 5 into 15
First of all you know it cannot be 24/10 and 16/5 because they are improper fractions so they will be GREATER than 1. 12/15 as a decimal is .8. If you divide the remaining fractions you will see that 4/5=.8 and 16/20 = .8

Need help on #4 Please

Answers

NO!!! a prime number cannot be a multiple of another number except itself because prime numbers are numbers that are ONLY DIVISIBLE by 1 and ITSELF

How many numbers from 1 to 100 can be divided by 2 with none leftover.

Answers

50 because half of the numbers in 100 are even and all even numbers are divisible by two

5 1/3-w= 4
These problems confuse me so much.

Answers

First, you would subtract 5 1/3 on each side, leaving you with -w = -1/3. Since you can't have a negative variable, you would then multiply each side by -1, giving you w = 1/3. Hope this helped and make sure to make this the brainliest answer :)

Please help it's due tommorow!! I need answers for questions 29-40

Answers

The Anwser to 29-40 is -11
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