We have 10 ml of 20% acid to which we need to add "x" milliliters of 100% acid to make 50% acid.
.20 * 10 + 1.00x = .50 * (10 +x)
in which "x" is the volume of the 100% acid to be added.
2 + x = 5 + .5 x
.5x = 3
x = 6 milliliters
Source:
http://www.1728.org/mixture.htm
Scroll down to problem B
Answer:
−7
Step-by-step explanation:
Answer:
Expanded Notation Form:
500,000 = 500,000 + 0 + 0 + 0 + 0 + 0
Expanded Factors Form:
500,000 = 5 × 100,000 + 0 × 10,000 + 0 × 1,000 + 0 × 100 + 0 × 10 + 0 × 1
Expanded Exponential Form:
500,000 = 5 × 10⁵ + 0 × 10⁴ + 0 × 10³ + 0 × 10² + 0 × 10¹ + 0 × 10⁰
Word Form:
500,000 = Five hundred thousand
Step-by-step explanation:
Because math says so..
