Abus travels 20 km in 30 minutes. what is the average speed of the bus?

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consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.