A Biologist Has a 40% Solution and a 10% Solution

question 107

Multiple Choice

A biologist has a 40% solution and a 10% solution of the same plant nutrient. How many cubic centimeters of each solution should be mixed to obtain 40 cc of a 25% solution? ​

• A) The biologist should mix 30 cc of 40% solution with 10 cc of 10% solution.
• B) The biologist should mix 20 cc of 40% solution with 20 cc of 10% solution.
• C) The biologist should mix 5 cc of 40% solution with 35 cc of 10% solution.
• D) The biologist should mix 10 cc of 40% solution with 30 cc of 10% solution.
• E) The biologist should mix 15 cc of 40% solution with 25 cc of 10% solution.

---

Definitions:

Heroin

An opioid drug made from morphine, a natural substance taken from the seed pod of the various opium poppy plants.

THC

Tetrahydrocannabinol, the principal psychoactive constituent of cannabis, responsible for its mind-altering effects.

Active Ingredient

The component of a drug or substance that is biologically active and responsible for its effects on the body.

Marijuana

A psychoactive drug from the Cannabis plant used for medical or recreational purposes, known for its effects on mood and perception.