1. Közösség
2. Feature Requests and General Site Feedback
3. Multivariable Calculus Mission

Collegiate maths like multivariable are greatly underrepresented on Khan Academy and will probably remain that way as long as the site is being pushed as a replacement for common middle school curr...

1. Közösség
2. Classroom Tips and Tricks
3. Grading

Since it's a pre-algebra class and you have the option of using KA full-time, I'm going to assume it's a middle school or high school class and thus that normal grade distributions aren't really ne...

1. Közösség
2. Study Group
3. if 30 mL of a 0.5 % solution is being prepared from a 6% solution, ___ mL of the 6% solution will be used?

0.5% of a 30 mL solution would be 0.15 mL of ingredient. Then we have to find the quantity of 6% solution that has 0.15 mL of ingredient. (qty of 6% solution)(6%) = 0.15 mL divide both sides by 6%...