ch of the following are rational numbers? 70.666... 87 88 -84

To determine which of the given numbers are rational, we need to understand the definition of a rational number. A rational number is any number that can be expressed as the quotient or fraction of two integers, where and are integers and .Let's analyze each number:1. **70.666...** - This number appears to be a repeating decimal. Repeating decimals can be expressed as fractions. For example, can be written as . Since it can be expressed as a fraction, it is a rational number.2. **87** - This is an integer. Any integer can be expressed as a fraction by placing it over 1 (e.g., ). Therefore, 87 is a rational number.3. **88** - Similar to 87, this is also an integer. It can be expressed as a fraction (e.g., ). Therefore, 88 is a rational number.4. **-84** - This is a negative integer. Integers are rational numbers because they can be expressed as fractions (e.g., ). Therefore, -84 is a rational number.Based on this analysis, all the given numbers are rational numbers. So, the answer is:- 70.666...- 87- 88- -84