santosrowan06 santosrowan06

01-02-2018
Mathematics

contestada

In seawater there is 5% of salt. How many liters of fresh water do you need to add to 30 liters of seawater to get a 1.5% solution of salt?

Respuesta :

zrh2sfo zrh2sfo

05-02-2018

Let x = amout of fresh water required
The amount of the salt remains the same
.05(30) = .015(x+30)
1.5 = .015x + .45

1.5 - .45 = .015x
1.05 = .015x
x = 1.05/.015
x = 70 liters of fresh water

check solution
.05(30) = .015(100)
1.5 = 1.5

Answer Link

Otras preguntas

Why did the Chinese peasants rebel against the manchus from 1850 to 1864?

What is the main difference between the right side and left side of the heart?

Which of the following nutrient cycles has its largest reservoir in the atmosphere? A) Carbon cycle B) Nitrogen cycle C) Potassium cycle D) Phosphorus cycle E)

Which sign is the less sign and which one is the greater sign (can someone please tell me I really need help! and I never understand the signs!) is this greater

Rewrite the following linear equation in slope-intercept form. Write your answer with no spaces. y+2=4(x-3)

The weekly sales of a magazine increased from 500,000 to 600,000. By what percentage did the magazine sales increase?

You are conducting an experiment with phosphorus and nitrogen being added to the soil of a growing plant. When the amount of added nitrogen is increased, the

what is the term for the condition where red blood shrivels?

Can you explain 3x+4/5=7/10. Solve

How many combinations of 3 students can a teacher choose from 32 students? A. 96