Calculus/Expert Profile

Average Ratings

• Knowledgeability 9.97
• Clarity of Response 9.91
• Timeliness 9.61
• Politeness 10.0

• Number of Questions (in Past 24 Hours) 1
• Max Questions to be Asked (in 24 Hour Period) 2
• Total Questions (since joining AllExperts) 583
• Volunteer Since 2004-05-28
• Prestige Points 7112

Recent Reviews from Users

Read More Comments

    K = Knowledgeability    C = Clarity of Response    T = Timeliness    P = Politeness

User	Date	K	C	T	P	Comments
Taylor	11/04/09	10	10	10	10
Thomas Allen	11/03/09	10	10	10	10	After I sat and typed it out .....
shahbaz	11/02/09	10	10	10	10	Thank u so much
Chenne	11/01/09	10	10	10	10
vsikandari	11/01/09	10	10	10	10	thanks

Recent Answers from Ahmed Salami

2009-11-04 Related Rates ladder:

Hi Kevin, Let the height of the ladder on the wall at any time be y, and the distance to the foot of the ladder be x. We know that x² + y² = 20² = 400 Differentiating with respect to x,

2009-10-31 Calculus:

Hi Chenne, y = 3arccos(x/2) dy/dx = 3.(1/2).-1/√[1 - (x/2)²] = -3 / 2√(1 - x²/4) at x = 1 dy/dx = -3 / 2√(1 - 1/4) = -3 / 2√(3/4) = -3 / √3

2009-10-31 calculas:

Hi Vsikandari, f(x) = a-x/a+x Let f(x) be y and its inverse z y = a-x/a+x y(a+x) = a-x ay + xy = a - x xy + x = a - ay x(y+1) = a(1-y) x = a(1-y)/(y+1) And so, the inverse of f(x) z = a(1-x)/(x+1)

2009-10-29 Calculus homework help:

Hi John, f(x) = ax³ + 3x² + bx f'(x) = 3ax² + 6x + b f''(x) = 6ax + 6 If x = 1 is a point of inflection, then f''(1) = 0, i.e 6a(1) + 6 = 0 a = -1 A local minimum occurs when f'(x) = 0, i.e 3ax²

2009-10-29 Help:

Hi Tyler, let the square base have sides with length x and the height be h. The base area = x² The box has four other sides with area xh and so the total area = 4xh The total cost of the base is then