Lesson 20/21 Major - Lab

Front

What is a tip and how is it calculated?

Back

A tip is a small amount of money given to someone for their service, typically calculated as a percentage of the total bill.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 15% of $26, calculate 26 * 0.15 = $3.90.

Front

What is the formula for calculating simple interest?

Back

Simple Interest = Principal x Rate x Time. For example, if you have $350 at an interest rate of 2.5% for 3 years, the interest is 350 * 0.025 * 3 = $26.25.

Front

What is percent error?

Back

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

Front

How do you find the percent error in a measurement?

Back

To find the percent error, subtract the actual value from the estimated value, take the absolute value, divide by the actual value, and multiply by 100.

Front

What is the actual acceleration due to Earth's gravity?

Back

The actual acceleration due to Earth's gravity is approximately 9.81 meters per second squared.

Front

If a bill is $27.31, how do you calculate a 23% tip?

Back

To calculate a 23% tip on a $27.31 bill, multiply 27.31 by 0.23, which equals approximately $6.28.

Front

What is the difference between estimated value and actual value?

Back

The estimated value is the value you predict or guess, while the actual value is the true or measured value.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 15% becomes 0.15.

Front

What is the significance of rounding in calculations?

Back

Rounding is used to simplify numbers to make them easier to work with, but it can also affect the accuracy of the result.