2/5 is a number and would be a Response area decimal. 2. −0.07 is a Response area number and would be a Response area decimal. 3. 49 is a Response area number and would be a Response area decimal. 4. 99−−√ is a Response area number and would be a Response area decimal. 5. −0.03521... is a Response area number and would be a Response area decimal. 6. 121−−−√ is a Response area number and would be a Response area decimal.
1. False. The fraction 2/5 is not a decimal number.
2. True. The number -0.07 is a decimal number.
3. True. The number 49 is a decimal number.
4. False. The expression 99−−√ is not a number nor a decimal.
5. True. The number -0.03521... is a decimal number.
6. False. The expression 121−−−√ is not a number nor a decimal.