1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Talja [164]
3 years ago
8

We have 500 grams of a 10% salt solution. How many grams of water must be added to dulite the solution to form a 4% solution. Sh

ow work
Mathematics
2 answers:
Arada [10]3 years ago
7 0
500x.04= 200 grams?


Good Luck!
lys-0071 [83]3 years ago
3 0
Hmm, one way is this
there's 500 times 0.10 or 50 grams of salt in the water
if we want to make 50 grams=4% of everything, how much water do we need to add

50=4% of all
50=0.04 of all
divide both sides by 0.04
1250=all
so
500+what=1250
minus 500 both sides
what=750

750 grams of water
You might be interested in
What is the area of this triangle ?
umka21 [38]

area = 1/2 *b*h

1/2 * 15 * 8 = 60 square units

4 0
4 years ago
Read 2 more answers
1 3/4 + 1 + y = 4 1/3 <br><br> what does the ‘y’ represent?
castortr0y [4]
The answer is y=1 12/17
3 0
3 years ago
Read 2 more answers
Dani is buying treats for her dog. She can buy treats individually from the bin for $0.19 each, or she can buy a package of 250
Ede4ka [16]
1 treat is 19 cents so you multiply 250 by 0.19 and you get 47.50 then take the $19.95 the amount for a package of treats and minus it from 47.50 and you save $27.55
3 0
4 years ago
Read 2 more answers
I Need Help! Asap, Please &amp; Thank You! I don't really understand what it means, or even how to answer it, for that matter, i
scZoUnD [109]

Answer:

Give me brainliest and Keep it there bc I need to rank up pls!

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
Find the volume v of the described solid s. the base of s is an elliptical region with boundary curve 4x2 + 9y2 = 36. cross-sect
Tasya [4]
4x^2+9y^2=36\iff\dfrac{x^2}9+\dfrac{y^2}4=1

defines an ellipse centered at (0,0) with semi-major axis length 3 and semi-minor axis length 2. The semi-major axis lies on the x-axis. So if cross sections are taken perpendicular to the x-axis, any such triangular section will have a base that is determined by the vertical distance between the lower and upper halves of the ellipse. That is, any cross section taken at x=x_0 will have a base of length

\dfrac{x^2}9+\dfrac{y^2}4=1\implies y=\pm\dfrac23\sqrt{9-x^2}
\implies \text{base}=\dfrac23\sqrt{9-{x_0}^2}-\left(-\dfrac23\sqrt{9-{x_0}^2}\right)=\dfrac43\sqrt{9-{x_0}^2}

I've attached a graphic of what a sample section would look like.

Any such isosceles triangle will have a hypotenuse that occurs in a \sqrt2:1 ratio with either of the remaining legs. So if the hypotenuse is \dfrac43\sqrt{9-{x_0}^2}, then either leg will have length \dfrac4{3\sqrt2}\sqrt{9-{x_0}^2}.

Now the legs form a similar triangle with the height of the triangle, where the legs of the larger triangle section are the hypotenuses and the height is one of the legs. This means the height of the triangular section is \dfrac4{3(\sqrt2)^2}\sqrt{9-{x_0}^2}=\dfrac23\sqrt{9-{x_0}^2}.

Finally, x_0 can be chosen from any value in -3\le x_0\le3. We're now ready to set up the integral to find the volume of the solid. The volume is the sum of the infinitely many triangular sections' areas, which are

\dfrac12\left(\dfrac43\sqrt{9-{x_0}^2}\right)\left(\dfrac23\sqrt{9-{x_0}^2}\right)=\dfrac49(9-{x_0}^2)

and so the volume would be

\displaystyle\int_{x=-3}^{x=3}\frac49(9-x^2)\,\mathrm dx
=\left(4x-\dfrac4{27}x^3\right)\bigg|_{x=-3}^{x=3}
=16

6 0
3 years ago
Other questions:
  • Which value must be added to the expression x2 + x to make it a perfect-square trinomial?
    8·2 answers
  • what type of number is -√6 A)Rational number B)Irrational number C)whole number D)natural number E) integer number. Reply quickl
    11·1 answer
  • a movie theater earns $3946 by selling 428 tickets. if a full price costs $10.25 and a discount costs $8, how many full price ti
    14·1 answer
  • Which statement is true about the number −5 ?
    15·1 answer
  • What is the product?(-2d^2+s)(5d^2-6s)
    15·1 answer
  • What is the slope of the line through (1,6) and (0,2)
    8·1 answer
  • What % is 25 out of 125
    6·1 answer
  • Carmen went to Target and bought a magazine for $4.99, a book for $12.99, and a DVD for $17.99. What was her total with a 6% sal
    9·2 answers
  • Annabelle’s bicycle has a wheel radius of 13 inches. She places a sticker on the wheel so that its minimum height above the grou
    9·1 answer
  • Two men are decorating a room. One has painted 20 m² and the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!