Calculus/Expert Profile


On Vacation
returns 03/07/2017

Any kind of calculus question you want. I also have answered some questions in Physics (mass, momentum, falling bodies), Chemistry (charge, reactions, symbols, molecules), and Biology (reproduction, insusion of chemicals into bloodstream).

Experience in the area

Experience in the area: I have tutored students in all areas of mathematics since 1980. Education/Credentials: BSand MS in Mathematics from Oregon State University, where I completed sophomore course in Physics and Chemistry. I received both degrees with high honors. Awards and Honors: I have passed Actuarial tests 100, 110, and 135.


Maybe not a publication, but I have respond to well oveer 8,500 questions on the PC. Well over 2,000 of them have been in calculus.


I aquired well over 40 hours of upper division courses. This was well over the number that were required. I graduated with honors in both my BS and MS degree from Oregon State University. I was allowed to jump into a few courses at college a year early.

Awards and Honors

I have been nominated as the expert of the month several times. All of my scores right now are at least a 9.8 average (out of 10).

Past/Present Clients

My past clients have been students at OSU, students at the college in South Seattle, referals from a company, friends and aquantenances, people from my church, and people like you from all over the world.

What do you like about this subject?

I was in a coma back in 1986; while in the hospital and before I could walk or talk, they told me I was assisting a nurse with math. I even enjoy doing it for fun ... don't you?

What do you still hope to achieve/learn in this field?

Doing even more mathematics. Maybe somebody wants me to do this for work, but until then ...

Something interesting about this subject that others may not know:

The natural log of e is 1 [ ln(e)=1 ], but did you know that e = 2.71828182845905... or that pi, the usual 3.14, is really 3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 ... and so on ...

Something controversial or provocative about this subject

Some people have controversies in statistics. When they say average, there are three different ways to do it. Some are interested in (max-min)/2, some are interested in the midway point, and some are actually interested in the true average (add 'em up and divide by n). This might not actaully be controversial, but at least you have read something here that is done in different ways.

Average Ratings

Recent Reviews from Users

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
Anthony05/05/16Yeah, didn't solve it even after given .....
Mitchell03/08/15Not what I was asking.
Prachi01/22/15101010Thankyou so much for clear my confusion

Recent Answers from Scotto

2016-09-28 surveys of calculus:

Sketch the graph of a function that satisfies the stated conditions below:  I'll give the info, and you can sketch it.     It is given that f is continuous and differentiable everywhere.    The sign diagram

2016-04-24 Calculus 2:

Sorry about the delay, but I haven't been able to do this for a few days.  Here's my answer, though ...    This is what a Taylor's series does.  It approximates a continuous function that is continuously

2016-04-17 Calculus:

lim(x->1)[(x^4 - 1)/(x^3 - 1)]  On this one, the top and bottom both factor.  The numerator is x^4 - 1 = (x+1)(x-1) = (x+1)(x+1)(x-1) and the  denominator is x^3 - 1 = (x-1)(x+x+1).  Cancelling the

2016-03-07 O/L:

A) Since X is the distance from O, when is X equal to 0?  That is when the particle is at O.  If 0 = t - 16/t, then 16/t = t, so 16 = t, so t = 4.    B) To find the velocity when t=5, note that the position

2016-02-04 Total fertility rate related mathematics:

It would far more than half it, for it is multiplicative.  Assuming the families have an average of 4 children and it take roughly 25 years for each generation, the would give roughly 160 billion in 2150


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