Question

1. 2/5
is a
number and would be a
decimal.

2. −0.07
is a
number and would be a
decimal.

3. 4/9
is a
number and would be a
decimal.

4. 99−−√
is a
number and would be a
decimal.

5. −0.03521...
is a
number and would be a
decimal.

6. 121−−−√
is a
number and would be a
decimal.

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Answer 1

1. 2/5 is a rational number and would be a terminating decimal (2/5 = 0.4).

2. −0.07 is a rational number and would be a terminating decimal (−0.07).

3. 4/9 is a rational number and would be a repeating decimal (4/9 = 0.\overline{4}).

4. √99 is an irrational number and would be a non‑terminating, non‑repeating decimal.

5. −0.03521... is an irrational number and would be a non‑terminating, non‑repeating decimal.

6. √121 is a rational number and would be a terminating decimal (√121 = 11 = 11.0).