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
Natali [406]
3 years ago
10

A scientist mixes water (containing no salt) with a solution that contains 35 % salt. She wants to obtain 245 ounces of a mixtur

e that is 5 % salt. How many ounces of water and how many ounces of the 35 % salt solution should she use?
Mathematics
1 answer:
Elenna [48]3 years ago
5 0

Answer:

Answer.  105 ounces of water is needed.

Let W = the volume of water to be mixed in ounces).

Then the volume of the 30% salt solution needed is (210-W).

The balance equation for the salt mass is

0.3*(210-W) = 0.15*210.

Simplify and solve for W:

63 - 0.3W = 31.5,

63 - 31.5 = 0.3W,

0.3W = 31.5,

W = 31.5%2F0.3 = 105.

Answer.  105 ounces of water is needed.

Step-by-step explanation:

You might be interested in
At the popular restaurant Fire Wok, 55%, percent of guests order the signature dish.
ANTONII [103]

55/100 or 11/20

Since 55% is 55/100 as a fraction. then at it's simplest form it's 11/20.

4 0
3 years ago
Read 2 more answers
A circle is increased to have a circumference that is 4 times larger than the original. Which of the following options best desc
kogti [31]
Area of a circle is directly proportional to the square of radius of the circle while the circumference is proportional to the radius of the circle. This means that if the radius of a circle is increased x times, then its area will be increased to x^2 times the original area, and the circumference will increase to x times the original circumference.

Thus when the radius is doubled, or in other words if radius mad 2 time the original radius, the area of circle will become 2^2 = 4 time the original area. The circumference will become 2 times the original circumference.

We can calculate exact area and circumference of a circle from its radius using the following equations:

Area of circle = (pi/4)*r^2

Circumference of circle = 2*pi*r

Where r is the radius of the circle.

I know this is a lot, sorry.
3 0
3 years ago
How do I solve this inequality?
ch4aika [34]
The correct answer is: x ≥1
7 0
3 years ago
Can someone help me with this.​
solong [7]
The answer to this question is 8-2.
7 0
3 years ago
grants plans to a factory enough water from 22 gallons in a 16% ammonia solution to make a 24% solution which equation can be us
Andreyy89
16/22=24/x

x=33

then subtract

33-22=11

11 galons should be taken out
5 0
3 years ago
Other questions:
  • What is the recursive rule for this geometric sequence? 3, 3/2, 3/4, 3/8
    6·2 answers
  • It costs <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="88acc8a6bdbf">[email&#160;protected]</a> to bu
    6·2 answers
  • *PLS ANSWER CORRECTLY WITH DETAILS* What is the surface area of this regular pyramid?
    13·1 answer
  • Al’s school bus travels 47 miles each day on its route, twice a day. Which is a reasonable estimate of the number of miles the b
    14·1 answer
  • HELP ME PLEASE !
    13·1 answer
  • The spinner on the right is divided into five equal-sized sectors. What is
    15·1 answer
  • What is 3x+8 if x=8
    12·2 answers
  • Simplify the expression.
    6·1 answer
  • If Bob deposits $5,000 at the beginning of each year for 10 years in an account paying 12% interest compounded annually, find th
    14·2 answers
  • There are twice as many girls as boys in Mr. Terpathi’s 7th grade math class. Each of the girls gave him an oatmeal cookie, and
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!