31 March, 2014

Estimating

Rhonda earns $625 a week. She needs to save 0. 22 of her weekly check. Estimate how much she needs to save each week. Expain whether the actual amount she neds to save is greater or less than your estimate. Will is buying several books. The cost of the books before tax is $188. The tax is 0. 175 of the cost. About how much will his total bill be? Lori works part-time and earns $252 a week. She needs to save 0. 275 of her paycheck for her monthly car payment. How should she round the factors to be sure to have enough money? About how much does she need to save each week. Do you know what I found? 1. Estimate: 20% is $125. You may call $125 an estimate. It is have low, but as you only need to add 10% more ($12. 50), you could easily get the final answer $137. 50 and be spot on.

2. 20% rounded down is $37 (estimate), but that's still high. 10% of $188 = $18. 80 5% = $9. 40 2. 5% = $4. 70 17. 5% = sum of these = $32. 90.

3. Estimate 30% rounded down to $1 = $75. That's high. Accurate answer $69. 30, and she should round up, say to $70 for convenience.

In the video I will teach you how to use Excel to build a worksheet for estimating projects for the small contractor. The end result is a very basic, but usa. . .


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