How can we help?

Steven J. Hunt

Steven J. Hunt commented, August 29, 2015 23:22
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...
Steven J. Hunt commented, August 29, 2015 05:49
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...
Steven J. Hunt commented, August 29, 2015 05:46
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%...