Topic 3 Review- C3

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What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the actual value. It is calculated using the formula: Percent Error = |(Estimated Value - Actual Value)| / Actual Value * 100.

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How do you calculate the unit rate?

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To calculate the unit rate, divide the total quantity by the number of units. For example, if 6.4 lbs of pistachios cost $19.33, the unit rate is $19.33 / 6.4 lbs.

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What is the formula to find the final price with tax?

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Final Price = Original Price + (Original Price * Sales Tax Rate). For example, if a book costs $14.95 and the sales tax is 6.5%, the final price is $14.95 + ($14.95 * 0.065).

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How do you find the discount amount?

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To find the discount amount, multiply the original price by the discount rate. For example, for a jacket priced at $85.00 with a 40% discount, the discount amount is $85.00 * 0.40.

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What is the unit rate of parts produced per hour if a machine makes 420 parts in 10 minutes?

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To find the unit rate in parts per hour, first find the rate per minute (420 parts / 10 minutes = 42 parts per minute) and then multiply by 60 minutes (42 parts/minute * 60 minutes = 2520 parts per hour).

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What does it mean to estimate a measurement?

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Estimating a measurement means making an educated guess about the value of a quantity based on available information, rather than measuring it precisely.

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How do you convert a percentage to a decimal?

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To convert a percentage to a decimal, divide the percentage by 100. For example, 40% as a decimal is 0.40.

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What is the relationship between sales tax and the final price?

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Sales tax is an additional charge added to the original price of an item, which increases the final price that a consumer pays.

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How do you calculate the cost of a specific weight using unit rate?

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To calculate the cost of a specific weight, multiply the unit rate (cost per pound) by the weight desired. For example, if the unit rate is $3.02 per lb, then for 2 lbs, the cost is $3.02 * 2.

Front

What is the formula for calculating percent error?

Back

Percent Error = |(Estimated Value - Actual Value)| / Actual Value * 100.