by DaleCallahan | Feb 8, 2017 | Blog
Where did all these formulas come from anyway? Here’s some interesting information on the Quadratic Equation. All forms of math and science (including cooking, shopping, etc) are loaded with formulas. Formulas are nothing but a relationship between two different...
by DaleCallahan | Feb 8, 2017 | Blog
Grab a copy of the model rocket activity here. This activity is suitable for any of the math courses or Algebra, Geometry, Algebra 2 with Trig, or Calculus. Note: We are talking about model rockets, which since they stay under the forces of the earth’s gravity,...
by DaleCallahan | Jan 14, 2017 | Algebra 2 wTrig Chapter 6, Algebra II with Trig
The quick hint is this… label the bottom length x so that the entire bottom section of the RIGHT triangle is d+x. Then you can say tan(ALPHA) = h / (x+d) tan (BETA) = h/x then solve the second for x and substitute into the first. For details, you can see the...
by DaleCallahan | Jun 28, 2016 | General High School Questions
The U.S. schools are weak in math – almost all of them regardless of public, private, or homeschool. The national weakness in math (and science – which is related) is a growing problem. Math and science are required for all STEM (Science, Technology,...
by DaleCallahan | May 10, 2016 | Calculus, Calculus Tests
Beverly asked: Looks like you have a simplification error in the second derivative. You have: f”(x)=12x^2-4=4(x-1) But it should be f”(x)=12x^2-4=4(3x^2-1) then the intervals for concavity all change. Am I missing something? Thank you so much for your good...
