Polly the parakeet tweets all day long. When she is happy, she tweets 18 times per minute. When she is hungry, she tweets 4 times per minute. And when she watches herself in the mirror, she tweets 45 times per minute. During a time period where she is happy for 20 minutes, hungry for 20 minutes, and watches her reflection for 20 minutes, what is the total number of times she will tweet?
Please answer and provide answer explanation.
1340
In 20 minutes, she happy tweets for 20 * 18 = 360 times.

In 20 minutes, she hungry - tweets for 20 * 4 = 80 times.

In 20 minutes, she tweets at her reflection 20 * 45 = 900 times.

Altogether, she tweets 360 + 80 + 900 = 1340 times.

.

The answer is 1340