Tutoring high school subjects, you learn about teenagers. The tutor tells a story about a recipe he found. On a late-July day in 2013, walking around Robron Centre with my kids, I saw a photocopy lying on the deserted pavement.…
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Category: home economics
Lifestyle: toy repair with J-B Weld, part II
Jack
Posted in engineering, handyman role, home economics, lifestyle, mechanics, physics
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The tutor continues about a toy repair, with some reinforcement ideas. While we were repairing the toy a few nights ago (see my previous post), my father-in-law suggested that, after the first repair cured, a second application should be considered…
Lifestyle: toy repair w/ J-B Weld
The tutor wonders about a pending toy repair. My younger son has a toy he really loves that broke. Specifically, a pot metal part sheared off. It’s a toy out of production, so can’t be replaced. Looking at the breakage,…
Spreadsheets: Excel circular reference: recursive deduction calculation
The tutor shows how to use a spreadsheet (Excel) to compute a recursive deduction rate using a circular reference. In yesterday’s post I brought up an example in which a deduction depends upon the income minus that same deduction. It’s…
Math: Deduction rates: a recursive example
Sometimes, deduction rates can be tricky. The tutor offers an example of a “circular argument.” Let’s imagine a benevolent employer offers a health plan that costs 6% of the employee’s net income. The company’s definition of net income is gross…
Spreadsheets: using names in formulas
The tutor shows an example of naming items in a spreadsheet for use in a formula. This post focuses on Microsoft Excel; hopefully I’ll do a similar one for a generic spreadsheet soon. Let’s imagine Jones faces two tax rates:…
Math: ounces to pounds and ounces
The tutor shows a conversion from early Math 10 Pre-Calc. Herein, I use the abbreviations oz for ounce and lb for pound. Example: Convert 1013 ounces to pounds and ounces. Solution: Realize that 16 oz=1 lb. Divide 1013 by 16…
Lifestyle: the Hydro bill
The tutor investigates higher household usage over last year. For Nov11-Jan11, our daily household usage this year was 6kWh above last year. My wife points to the new electric fireplace downstairs as the culprit. More specifically, she means that it’s…
Financial math: can time be negative?
The tutor answers a question that brought someone to his site. These days, Oracle Tutoring gets between 5000 and 6000 distinct visitors per month. Looking over the raw log entries of how some visitors arrived, I saw an inquiry yesterday…
The handyman role: reconnecting the barbecue
The tutor shares an adventure in his handyman-lite role. For big jobs, I call in professionals with crews, etc. (It’s amazing what those guys know and can do.) The smaller jobs I try to handle myself. Even a small job…
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