by DaleCallahan | Oct 8, 2014 | Calculus, Calculus Chapter 1
Here is the solution to this even numbered problem: Ch1.3Number38.pdf
by DaleCallahan | Oct 8, 2014 | Geometry, Geometry Chapter 3
Question from Kimberly: p. 113 “Sun Directions”Says, “If a circular protractor…the coordinate of OA is 50.”What are we missing? Seems like it should be 45, not 50. Answer from Dr. Callahan: This is a given – not a question. This...
by DaleCallahan | Oct 1, 2014 | Algebra
Question from Cynthia: Algebra I Chapter 13 Lesson 6 Problem 9 h. If we follow the books example on page 632 we get the correct answer. If we try to use your DVD’s formula for this lesson we can not get it to work out at all. Answer from Dr. Callahan Yes, this...
by DaleCallahan | Sep 19, 2014 | Algebra II with Trig
How do we work Algebra II with Trig Chapter 1.3 #73? Solution a) Area after purple section cut out A = (20 times 20) – 4(x^2) = -4x^2 + 400 = -4(x^2 – 100) = -4(x + 10)(x – 10) b) V = Area of bottom times height = (20-2x)(20-2x) x =...
by DaleCallahan | Sep 5, 2014 | Geometry
Question from Lisa We were working on Lesson 2-2 today and had difficulty understanding the Euler diagram in #29. As I understand it, the diagram is saying “If it is frozen carbon dioxide, then it is dry ice.” What I don’t understand is how you go from...
